In the religion of Islam the way of righteousness is to believe in God; taking Him at His word and obeying concerning the things He commanded and one of the ruling He commanded is to believe in His messengers and to make no distinction among all His messengers. This is because mankind is one nation as stated in Surah 21:92 Verily, this brotherhood of yours is a single brotherhood, and I am your Lord and Cherisher: therefore serve Me (and no other).
The Islamic article of faith is clearly manifest in the Quran at Surah 2:177 It is not righteousness that ye turn your faces towards east or west; but it is righteousness- to believe in Allah and the Last Day, and the Angels, and the Book, and the Messengers; to spend of your substance, out of love for Him, for your kin, for orphans, for the needy, for the wayfarer, for those who ask, and for the ransom of slaves; to be steadfast in prayer, and practice regular charity; to fulfill the contracts which ye have made; and to be firm and patient, in pain (or suffering) and adversity, and throughout all periods of panic. Such are the people of truth, the Allah-fearing. The main reason to believe in His messengers is as stated in Surah 4:136 O ye who believe! Believe in Allah and His Messenger, and the scripture which He hath sent to His Messenger and the scripture which He sent to those before (him). Any who deny Allah, His angels, His Books, His Messengers, and the Day of Judgment, hath gone far, far astray. During the past Allah make a covenant with the Children of Israel to believe in all His messengers as stated in Surah 5:12 Allah did aforetime take a covenant from the Children of Israel, and we appointed twelve captains among them. And Allah said: “I am with you: if ye (but) establish regular prayers, practice regular charity, believe in my messengers, honor and assist them, and loan to Allah a beautiful loan, verily I will wipe out from you your evils, and admit you to gardens with rivers flowing beneath; but if any of you, after this, resist faith, he hath truly wandered from the path or rectitude.” And in the Quran, the book of the last messenger, Prophet Muhammad (Pbuh) mankind was commanded to believe and follow him as stated in Surah 7:158 Say: “O men! I am sent unto you all, as the Messenger of Allah, to Whom belong the dominion of the heavens and the earth: there is no god but He: it is He That give both life and death. So believe in Allah and His Messenger, the Unlettered Prophet, who believeth in Allah and His words: follow him that (so) ye may be guided.”
All the messengers were sent with the same mission that they were to warn and give glad tidings to mankind as stated at Surah 6:48 We send the messengers only to give good news and to warn: so those who believe and mend (their lives), upon them shall be no fear, nor shall they grieve. Further it is stated in Surah 18:56 We only send the messengers to give Glad Tidings and to give warnings: But the unbelievers dispute with vain argument, in order therewith to weaken the truth, and they treat My Signs as a jest, as also the fact that they are warned! Furthermore Allah justified His action sending messengers to all communities because ultimately nobody can give any excuse as stated in Surah 4:165 Messengers who gave good news as well as warning, that mankind, after (the coming) of the messengers, should have no plea against Allah: For Allah is Exalted in Power, Wise. Ultimately in the hereafter those who failed in this world to follow the right path will admit and cannot deny that they were warned as confirmed by Surah 67 6-11 For those who reject their Lord (and Cherisher) is the Penalty of Hell: and evil is (such), destination. When they are cast therein, they will hear the (terrible) drawing in of its breath even as it blazes forth, almost bursting with fury: Every time a Group is cast therein, its Keepers will ask, “Did no Warner come to you?” They will say: “Yes indeed; a Warner did come to us, but we rejected him and said, ‘(Allah) never sent down any (Message): ye are nothing but an egregious delusion!'” They will further say: “Had we but listened or used our intelligence, we should not (now) be among the Companions of the Blazing Fire!” They will then confess their sins: but far will be (Forgiveness) from the Companions of the Blazing Fire!
Allah is impartial He had been sending messengers to all the communities in this world and no community had been neglected as stated in Surah 16:36 “And We have indeed sent a Messenger to every Ummah (community, nation) (saying): “Worship Allah (Alone), and shun the Taghut (all false deities)” Then among them were some whom Allah guided, and among them were some who deserved to be left to stray. So travel through the land and see the end of those who denied (the truth)” Nevertheless the examples given in the Quran is ample to show the various communities which has received their messengers like the people of Noah, Hud of the Aad, Salleh of the Thamud and many more listed in the Quran but some of the stories of the messengers was not told in the Quran as stated in Surah 40:78 We did aforetime send messengers before thee (O Muhammad): of them there are some whose story We have related to thee, and some whose story We have not related to thee. It was not (possible) for any messenger to bring a sign except by the leave of Allah: but when the Command of Allah issued, the matter was decided in truth and justice, and there perished, there and then those who stood on falsehoods.
However it is Allah’s prerogative whom He chooses to be His messengers and it is His prerogative to rank them in the eyes of the world to perceive as is indicated in Surah 3:179 Allah will not leave the believers in the state in which ye are now, until He separates what is evil from what is good nor will He disclose to you the secrets of the Unseen. But He chooses of His Messengers whom He pleases. So believe in Allah. And His messengers: And if ye believe and do right, ye have a reward without measure. Furthermore being All Mighty is Allah, He is also the One who can rank His messengers as He pleases as stated in Surah 2;253 Those messengers We endowed with gifts, some above others: To one of them Allah spoke; others He raised to degrees (of honor); to Jesus the son of Mary We gave clear (Signs), and strengthened him with the holy spirit. If Allah had so willed, succeeding generations would not have fought among each other, after clear (Signs) had come to them, but they (chose) to wrangle, some believing and others rejecting. If Allah had so willed, they would not have fought each other; but Allah fulfill His plan. And In addition as stated in Surah 17:55 And it is your Lord that know best all beings that are in the heavens and on earth: We did bestow on some prophets more (and other) gifts than on others: and We gave to David (the gift of) the Psalms. As being such this is Allah He is God and He can say of His favorite messengers by ranking them but this is His prerogative and is absolutely His privilege but it is impermissible for any human to do.
For mankind Allah commanded those who believe to treat all of His messengers as equal and that they should believe, honor and to follow their examples as depicted in Allah’s guidance in the Quran. The command is clear as stated in Surah 2:136 Say ye: “We believe in Allah, and the revelation given to us, and to Abraham, Ismael, Isaac, Jacob, and the Tribes, and that given to Moses and Jesus, and that given to (all) prophets from their Lord: We make no difference between one and another of them: And we bow to Allah (in Islam).” And as a covenant to Allah His messenger pledged to obey this command and as believers we should be following his example by making the similar declaration as stated in Surah 2:285 The Messenger believe in what hath been revealed to him from his Lord, as do the men of faith. Each one (of them) believeth in Allah, His angels, His books, and His messengers. “We make no distinction (they say) between one and another of His messengers.” And they say: “We hear, and we obey: (We seek) Thy forgiveness, our Lord, and to Thee is the end of all journeys.” These people who believes and make no distinction among the messengers Allah promise them of their reward as stated in Surah 4:152 To those who believe in Allah and His apostles and make no distinction between any of the apostles, we shall soon give their (due) rewards: for Allah is Oft- forgiving, Most Merciful.
Thus since those who make no distinction among the messengers will receive the rewards from their Lord then those who disobeys by making distinction are committing sin whether they realized it or not. A few citations can be mentioned as an abuse of the directive given by Allah is clearly seen in the example of making declaration to be a Muslim in which only one messenger is mentioned of the messenger Muhammad (Pbuh) instead of declaring as stated in Surah 2:136 or Surah 4:84.which is declared by Prophet Muhammad himself (Pbuh). Furthermore to become muslim, the Prophet Muhammad followed the way of Prophet Abraham (Pbuh) as stated in Surah 2:131 When his Lord said to him, Be a Muslim, he (Abraham) said: I submit (aslamtu) myself to the Lord of the worlds. There is no distinction among the messengers as this same declaration is being done by all the other prophets and messengers od Allah. This is evidence from Prophet Muhammad (Pbuh) who follow the Prophet Abraham (Pbuh) as stated in Surah 3:68 Without doubt, among men, the nearest of kin to Abraham, are those who follow him, as are also this Prophet and those who believe: And Allah is the Protector of those who have faith. It can be clearly seen that both of them declared the same declaration at Surah 2:131 for prophet Abraham (Pbuh) and for Prophet Muhammad (Pbuh) at Surah 40:66 Say: “I have been forbidden to invoke those whom ye invoke besides Allah, seeing that the Clear Signs have come to me from my Lord; and I have been commanded to bow (in Islam) to the Lord of the Worlds.” And those who follow the Prophet Muhammad will do the same as stated in Surah 3:20 So if they dispute with thee, say: “I have submitted (aslamtu) My whole self to Allah and so have those who follow me.” And say to the People of the Book and to those who are unlearned: “Do ye (also) submit (aslamtum) yourselves?” If they do they are in right guidance, but if they turn back, Thy duty is to convey the Message; and in Allah’s sight are (all) His servants. In another example to be a muslim which happened during the time of Solomon, the Queen of Saba did declared the same as stated in Surah 27:44 She was asked to enter the lofty Palace: but when she saw it, she thought it was a lake of water, and she (tucked up her skirts), uncovering her legs. He said: “This is but a palace paved smooth with slabs of glass.” She said: “O my Lord! I have indeed wronged my soul: I do (now) submit (aslamtu), with Solomon, to the Lord of the Worlds.” From these stories related in the Quran it can be reiterated that this offend is glaring during recitation in the daily prayers where only Prophet Muhammad and Prophet Abraham names and their families have been mentioned making them distinction from other prophets and messengers. However none shall commit unnecessary sin if one follows the examples shown above by the guidance in the Quran.
For those who disbelieve in Allah’s messengers and make distinction among them in term of rank and importance will receive the penalty due to them as stated in Surah 4:150-152 Those who deny Allah and His apostles, and (those who) wish to separate Allah from His apostles, saying: “We believe in some but reject others”: And (those who) wish to take a course midway, They are in truth (equally) unbelievers; and we have prepared for unbelievers a humiliating punishment. To those who believe in Allah and His messengers and make no distinction between any of the messengers, we shall soon give their (due) rewards: for Allah is Oft-forgiving, Most Merciful. Finally it is stated in Surah 21:50 And this is a blessed Message which We have sent down: will ye then reject it?