Allah Disclaims Begetting Anyone - Surah 4
Almighty Allah commanded: 0 people of the Scripture (Jews and Christians)! Do not exceed the limits in your religion, nor say of Allah aught but the truth. The Messiah Jesus, son of Mary was (no more than) a Messenger of Allah and His Word, ("Be" - and he was) which He bestowed on Mary and a spirit (Ruh) created by Him; so believe in Allah and His Messengers. Say not: 'Three (trinity)!" Cease! (It is) better for you. For Allah is (the only) One Ilah (God), Glory be to Him (Far Exalted is He) above having a son. To Him belongs all that is in the heavens and all that is in the earth. And Allah is All-Sufficient as a Disposer of affairs.
The Messiah will never be proud to reject to be a slave to Allah, nor the angels who are near (to Allah). And whosoever rejects His worship and is proud, then He will gather them all together unto Himself So, as for those who believed (in the Oneness of Allah - Islamic Monotheism) and did deeds of righteousness, He will give their (due) rewards, and more out of His Bounty. But as for those who refuse His worship and were proud, He will punish them with a painful torment. And they will not find for themselves besides Allah any protector or helper. Surah 4: 171-173
Allah Disclaims Ezra as a Son
Almighty Allah also declared: And the Jews say: Ezra is the son of Allah, and the Christians say: Messiah is the son of Allah. That is a saying from their mouths. They imitate the saying of the disbelievers of old. Allah Curse be on them, how they are deluded a way from the truth!
They (Jews and Christians) took their rabbis and their monks to be their lords besides Allah, (by obeying them in things which they made lawful or unlawful according to their own desires without being ordered by Allah) and (they also took as their lord) Messiah, son of Mary, while they (Jews and Christians) were commanded (in the Torah and the Gospel) to worship none but One Ilah (God - Allah) La ilaha illa Huwa (none has the right to be worshiped but He). Praise and glory be to Him, (far above is He) from having the partners they associate (with Him). Surah 9: 30-32