Surah Ar-Rum Verse 60

فَاصْبِرْ إِنَّ وَعْدَ اللَّهِ حَقٌّ ۖ وَلَا يَسْتَخِفَّنَّكَ الَّذِينَ لَا يُوقِنُونَ

So be patient. Indeed, the promise of Allah is truth. And let them not disquiet you who are not certain [in faith]