Almighty Allah refuted the claims of the Jews and the Christians in many verses of the Glorious Qur'an.

And they say: 'The Most Beneficent (Allah) has begotten a son (or offspring or children) as the Jews say: Ezra is the son of Allah, and the Christians say that He has begotten a son (Christ), and the pagan Arabs say that He has begotten daughters (angels, etc.)."

Indeed you have brought forth (said) a terrible evil thing Where by the heavens are almost torn, and the earth is split asunder, and the mountains fall in ruins, that they ascribe a son (or offspring or children) to the Most Beneficent (Allah).

But it is not suitable for (the Majesty of) the Most Beneficent (Allah) that He should beget a son (or offspring or children). There is none in the heavens and the earth but comes unto the Most Beneficent (Allah) as a slave. Verily He knows each one of them, and has counted them a full counting And everyone of them will come to Him alone on the Day of Resurrection (without any helper, or protector or defender). Surah 19: 88-95

Allah Disclaims Begetting Anyone - Surah 6

Allah the Exalted also declared: Yet, they join the jinns as partners in worship with Allah, though He has created them (the jinns), and they attribute falsely without knowledge sons and daughters to Him. Be He Glorified! And Exalted above (all) that they attribute to Him.

He is the Originator of the heavens and the earth. How can He have children when He has no wife? He created all things and He is the All-Knower of everything.

Such is Allah your Lord! La ilaha illa Huwa (none has the right to be worshipped but He), the Creator of all things. So worship Him (Alone), and He is the Wakil (Trustee, Disposer of affairs, Guardian etc.) over all things.

No vision can grasp Him, but His Grasp is over all vision. He is the Most Subtle and Courteous, Well-Acquainted with all things. Surah 6: 100-103

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