[3:47] She said, 'Lord, how shall I have a child when no mortal has touched me?' He said, 'It is such. God creates what He will.
Just as you witnessed the appearance of things contrary to ordinary reality in the provision which We gave to you, likewise We will we annul ordinary reality by creating a son without the contact of a man.
[3:47] When He decrees a thing,
i.e., He desires a ruling (ḥukm) to come to pass
[3:47] He says to it only: “Be”, and it is'.
Origination and creation are not difficult for Him. When they began to blame her, God caused Jesus (ʿa) to speak when he was one day old, saying: I have come to you with a sign from your Lord [3:49].