.Sura 5:73 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.
Sura 4:171 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 a messenger of Allah, and His Word, which He bestowed on Mary, and a spirit proceeding from Him: so believe in Allah and His messengers. Say not "Trinity": desist: it will be better for you: for Allah is one Allah: Glory be to Him: …
Sura 112:1 Say: Say: He is Allah, the One and Only; 112:2 Allah, the Eternal, Absolute; 112:3 He begetteth not, nor is He begotten;
Sura 5:72 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.
5:72 Pagans indeed are those who say that God is the Messiah, son of Mary. The Messiah himself said, "O Children of Israel, you shall worship God; my Lord and your Lord." Anyone who sets up any idol beside God, God has forbidden Paradise for him, and his destiny is Hell. The wicked have no helpers.