Quran 21.26-28
And they say: The Beneficent hath taken unto Himself a son. Be He Glorified! Nay, but (those whom they call sons) are honoured slaves; They speak not until He hath spoken, and they act by His command. He knoweth what is before them and what is behind them, and they cannot intercede except for him whom He accepteth, and they quake for awe of Him.