Surah No. 2, Al Baqr, part of Ayat No. 272

لَيْسَ عَلَيْكَ هُدَاهُمْ وَلَٰكِنَّ اللَّهَ يَهْدِي مَنْ يَشَاءُ

Translation :

It is not your responsibility (O Prophet) to guide them, but Allah guides whom He Will.

Surah No. 88, Al Ghashia, Ayats No. 21-22

o لَّسْتَ عَلَيْهِم بِمُصَيْطِرٍ o فَذَكِّرْ إِنَّمَا أَنتَ مُذَكِّرٌ

(O Prophet) Remind them, your task is only to advise them. You cannot compel them to (believe).