"Certainly they disbelieve who say: Surely Allah is the third (person) of the three; and there is no god but the one God, and if they desist not from what they say, a painful chastisement shall befall those among them who disbelieve."
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"Regarding Sonship of Jesus: That is Jesus, son of Mary, in word of truth, concerning which they are doubting. It is not for God to take a son unto Him. Glory be to Him! When He decrees a thing, He but says to it " Be" , and it is. (Qur'an 19:34,35) And they say, 'The All-merciful has taken unto Himself a son.' You have indeed advanced something hideous. The heavens are well nigh rent of it and the earth split asunder, and the mountains well nigh fall down crashing for that they have attributed to the All-Merciful a son; and it behoves not the All-Merciful to take a son. None is there in the heavens and earth but he comes to the All-Merciful as a servant. (Qur'an 19:88-93) Truly the likeness of Jesus, in God's sight, is as Adam's likeness; He created him of dust, then said He unto him, " Be" , and he was. (Qur'an 3:59) People of the Book, go not beyond the bounds in your religion, and say not as to God but the Truth. The Messiah, Jesus, son of Mary, was only the Messenger of God, and His Word that He committed to Mary, and a spirit from Him. So believe in God and His Messengers, and say not, 'Three', Refrain, better is it for you. God is only One God. Glory be to Him - that He should have a son! To Him belongs all that is in the heavens and in the earth, God suffices for a guardian." (Qur'an 4:171)