They (The Christians, pagans, etc.) say: “Allah has begotten a son!” Glory be to Him! He is self-sufficient! His is all that is in the Heavens and in the Earth! Have you any proof for what you say? Would you ascribe to Allah something about which you have no knowledge?
Meaning:-
Pagans: Worship more than one god, A follower of a polytheistic.
Ascribe: is to give credit for something to a specific cause, to attribute as a quality; consider as belonging to.