Surah 5:116 – And behold! Allah will say: “O Jesus the son of Mary! Didst thou say unto men, worship me and my mother as two gods in derogation of Allah’?” He will say: “Glory to Thee! Never could I say what I had no right (to say). Had I said such a thing, thou wouldst indeed have known it. Thou know what is in my heart, though I know not what is in Thine. For Thou know in full all that is hidden.
The Christians claimed that the Quran quoted in error that Mary was one of the Trinity. The Trinity is made up of the Father, the Holy Ghost and the Son. And Mary was never worshipped by the Christians as part of the Trinity, it is the Holy Ghost. According to them the Qur’an shows that there was little knowledge in Mecca of the New Testament apart from the story of the virginal conception of Jesus (S19:16-21). On the other hand several mistaken ideas about Christianity appear to have been current among the Meccans. They supposed that Christians worshipped three gods, taking both Jesus and Mary as gods. “The Qur’an here denounces the idea of a Triad of Gods, consisting of God, Jesus and Mary. Christians have never believed in this Triad. It is only too true that many ignorant “Christians” in Muhammad’s time worshipped Mary (as some still do), asking her to intercede with her Son for them, and the early Muhammadans may hence have fancied that belief in three separate Gods, of which Mary was one, was what was meant by the doctrine of the Trinity. But such an idea was wrong and of heathen origin.”
To counter the Christians assumption above on the Trinity, the Quran never mentioned what comprise or were included in the belief of the Trinity of the Christians. The quote in the Quran is “open handed” as it is stated in S5:73 They do blaspheme who say: Allah is one of three in a Trinity: for there is no god except One Allah. If they desist not from their word (of blasphemy) verily a grievous penalty will befall the blasphemers among them. Thus in any belief whether it is the belief of the Father, the Holy Ghost and the Son or there is a belief of the Trinity of the God, the Son and Mary or any other combination it is blasphemy according to the message of the Quran. There is no mistake or error in the Quran on this concept of Trinity of the belief of three gods whoever believe in gods in Trinity is blasphemy. Similarly the belief of worshipping of two gods it is written in the Quran at S16:51 Allah has said: “Take not (for worship) two gods: for He is just One Allah: then fear Me (and Me alone).” And the irony of S5:116 as stated above Allah did not ask the Christians whether they worship Jesus and mother as gods but the inquiry was posed to Jesus himself “O Jesus the son of Mary! Didst thou say unto men, worship me and my mother as two gods in derogation of Allah’?” and the question was answered by Jesus in the hereafter in the same verse S5:116 “Glory to Thee! Never could I say what I had no right (to say). Had I said such a thing, thou wouldst indeed have known it. Thou know what is in my heart, Thou I know not what is in Thine. For Thou know in full all that is hidden. Thus there is no mention in the Quran of Mary being one of the Trinity but for Jesus to answer whether he had declared himself and his mother as two gods. Nevertheless if the Christians claimed they did not worship Jesus and his mother as two gods it is well and fine but worshipping even Jesus as god has its consequences as stated in S5:72 They do blaspheme who say: “Allah is Christ the son of Mary.” But said Christ: “O Children of Israel! Worship Allah my Lord and your Lord” Whoever joins other gods with Allah, Allah will forbid him the garden, and the fire will be his abode. There will for the wrong-doers be no one to help.
Thus from the above narration there is no mistakes written in the Quran of the Trinity as it is “open handed” no detailed were included as to whom comprises of the Trinity except Allah and Allah inquiry is directed to Jesus whether he declared himself and his mother as two gods. The claim of the mistake in the Quran of the Christian Trinity is with those who misinterpreted the Quran and form its own conclusion but certainly they cannot escape the blasphemous concept of having believed in the Trinity itself.