Kindly produce your proof.
Where in the Qur’an is it stated that Mary is part of the Trinity?
Although others have answered you, here’s my go at it…
Q: Iv) According to Qur’an and earlier commentaries, the Christian Trinity consists of God, Mary and Jesus, e.g. 5:116.
A: (d) There were and there are such Christian denominations who include Mary in God head. As they are lesser in number, Qur’an mentioned them. But on other occasions, when the Qur’an denounces Trinity, the statement is applicable to all those who practice any kind of Trinity in the worship of God. The following verse may include even thou who believe in the Trinity of Brahma, Vishnu and Shiva, professing God-head for them.
islamicvoice.com/april.98/OURD.HTM
Remember this is AFTER the Trinity was affirmed, and as I claimed earlier, Muhammad got his idea from heretical Christians and he simply assumed that they were representative of all Christians.
But there’s more…
From elsewhere on the same site…
“As for erroneous Christian concepts, the Qur’an speaks of the Christian belief in the trinity and their claim that Jesus, son of Mary, was Allah Himself.
They also attribute divinity to Jesus and his mother, considering them gods. They also consider their priests and monks to have divine authority.”
islamicvoice.com/february.98/SPEA.HTM
"The following verses in the Qur’an say about Mary being the part of Trinity.
And behold! Allah will say: “O Jesus the son of Mary! Didst thou say unto men, ‘Take me and my mother for two gods beside 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 knowest what is in my heart, though I know not what in Thine. For Thou knowest in full all that is hidden. [Qur’an 5:116]
O People of the Book! Commit no excesses in your religion: nor say of Allah aught but the truth. Christ Jesus the son of Mary was (no more than) a messenger from Allah, and His Word, which He bestowed on Mary, and a spirit proceeding from Him: so believe in Allah and His Messengers. Say not “Three”: desist: It will be better for you: For Allah is One God: Glory be to Him: (Far Exalted is He) above having a son. To Him belong all things in the heavens and on earth. And enough is Allah as a Disposer of affairs. [Qur’an 4:171]"
islamic-awareness.org/Quran/Contrad/External/marytrin.html
This site then makes the laughable attempt at re-writing Christian dogma, to state that when Muhammed stated this, Christians had this as the Trinity, but we later changed it!
It ends with this…
“So, in conclusion, there is no point calling the modern day trinitarian Christianity as ‘true’ Christianity and all others as ‘false’ since the evolution of this doctrine itself is very late. The early Christianity had bizarre beliefs about their doctrine as well as their Scriptures. Moreover the Jesus(P) and early Church Fathers were utterly unaware of this doctrine and they never practiced it. Would then the modern day ‘true’ Christianity brand them as heretics?” (Ibid)
That regardless of which “Trinity” Christians now believe in, it’s still condemned.
Here’s another spin; that by default of honouring Mary as the Theotokos (Mother of God) we make here a member of the Trinity, instead of the Holy Spirit…
" The obvious conclusion is that for all practical purpose and in reality, when the issue is of Worshipping, Venerating, Deifying and/or Idolizing, it is Mary - the “Mother of God” and not the Holy Ghost has that kind of rank and status. Briefly, the historical figures of Jesus and Mary are venerated as Deities. The Holy Ghost is not venerated as a Deity."
mostmerciful.com/mary.htm