رَّبُّكُمْ أَعْلَمُ بِكُمْ ۖ إِن يَشَأْ يَرْحَمْكُمْ أَوْ إِن يَشَأْ يُعَذِّبْكُمْ ۚ وَمَآ أَرْسَلْنَـٰكَ عَلَيْهِمْ وَكِيلًا
Rabbukum a'lamu bikum iny yashaaa yarhamkum aw iny yashaa yu'azzibkum; wa maaa arsalnaaka 'alaihim wakeelaa
Your Lord knows you best. If he wills, he shows you mercy; if he wills, he punishes you. And we did not send you as a guardian over them.