Quran (or Qoran) is the holy book of Muslims which is sent down to the prophet Muhammad (pbuh). Its content is not changed during more than 1400 years. Here you can find the opinion of Islam about Jesus Christ and the Christian doctrine of the
Trinity. The following sentences are taken from Quran:
They have certainly disbelieved who say, "Allah is the Messiah, the son of
Mary"
while the Messiah has said, "O Children of Israel, worship Allah,
my Lord and your Lord." Indeed, he who associates others with Allah -
Allah has forbidden him Paradise, and his refuge is the Fire. And there
are not for the wrongdoers any helpers.
5:72
They have certainly disbelieved who say, "Allah is the third of three (Trinity)." And
there is no god except one God. And if they do not desist from what they are saying, there will surely afflict the disbelievers among them a painful punishment.
5:73
So will they not repent to Allah and seek His forgiveness? And Allah is Forgiving and Merciful.
5:74
The Messiah, son of Mary, was not but a messenger; [other] messengers have passed on before him. And his mother was a supporter of truth.
They both used to eat food. Look how We make clear to them the signs; then look how they are deluded.
5:75
