Al-Qasas - 28:56

إِنَّكَ لَا تَهْدِي مَنْ أَحْبَبْتَ وَلَكِنَّ اللَّهَ يَهْدِي مَن يَشَاء وَهُوَ أَعْلَمُ بِالْمُهْتَدِينَ
[28:56]
Surely you cannot guide whom you love, but Allah guides whom He pleases, and He knows best the followers of the right way.
It is true thou wilt not be able to guide every one, whom thou lovest; but Allah guides those whom He will and He knows best those who receive guidance.
Lo! thou (O Muhammad) guidest not whom thou lovest, but Allah guideth whom He will. And He is Best Aware of those who walk aright.