Allah Disclaims Christian Beliefs About Jesus
Allah the Exalted warned: Surely they have disbelieved who say: 'Allah is the Messiah (Jesus), son of Mary." But the Messiah (Jesus) said: "O Children of Israel! Worship Allah, my Lord and your Lord." Verily whosoever sets up partners in worship with Allah, then Allah has forbidden Paradise for him, and the Fire will be his abode. And for the Zalimun (polytheists and wrong-doers) there are no helpers.
Surely disbelievers are those who said: 'Allah is the third of the three (in a Trinity)." But there is no Ilah (god) (none who has the right to be worshipped) but One Ilah (God- Allah). And if they cease not from what they say verily a painful torment will befall the disbelievers among them.
Will they not repent to Allah and ask His Forgiveness? For Allah is Oft-Forgiving Most Merciful.
The Messiah (Jesus), son of Mary, was no more than a Messenger; many were the Messengers that passed a way before him. His mother (Mary) was a Siddiqah i.e. she believed in the Words of Allah and His Books. They both used to eat food (as any other human being, while Allah does not eat). Look how We make the Ayat (proofs, evidences, verses, lessons, signs, revelations, etc.) clear to them, yet look how they are deluded a way (from the truth). Surah 6: 72-75
Allah Disclaims Begetting Anyone - Surah 17
And Almighty Allah ordered: And say: 'All the praises and thanks be to Allah, Who has not begotten a son (nor an offspring), and Who has no partner in (His) Dominion, nor He is low to have a Wali (helper, protector or supporter). And magnify Him with all the magnificence, Allah u-A kbar (Allah is the Most Great). " Surah 17: 111
Allah Disclaims Begetting Anyone - Surah 112
The pagans once asked the Prophet Muhammad : 'To whom is your Lord related, His original ancestors and His various branches of descendants?" It is also reported that the Jews said: "We worship Ezra, the Son of Allah," and the Christians said: "Jesus is the Son of Allah," and the Magians said: "We worship the sun and the moon," and the Pagans said: "We worship idols."
In response to all of them Allah revealed some of His attributes: Unity, Uniqueness, and other substantives:
Say (0 Muhammad): "He is Allah, (the) One. Allah AsSamad (The Self-Sufficient Master, Whom all creatures need, He neither eats nor drinks). He begets not, nor was He begotten; and there is none co-equal or comparable unto Him. " Surah 112: 1-4