Al-Qasas 28:56

Innaka la tahdee man ahbabtawalakinna Allaha yahdee man yashao wahuwaaAAlamu bilmuhtadeen

Indeed, [O Muḥammad], you do not guide whom you like, but Allāh guides whom He wills. And He is most knowing of the [rightly] guided.

You cannot give guidance to whomsoever you wish, but Allah gives guidance to whomsoever He wills, and He best knows the ones who are on the right path.