اللَّهُمَّ إِنَّكَ خَلَقْتَ نَفْسي وَأَنْتَ تَوَفَّاهـَا، لَكَ مَمَاتُهَا وَمَحْيَاهَا، إِنْ أَحْيَيْتَهَا فَاحْفَظْهَا، وَإِنْ أَمَتَّهَا فَاغْفِرْ لَهَا، اللَّهُمَّ إِنَّي أَسْألُكَ العَافِيَةَ

O Allāh, verily You have created my soul and You shall take its life, to You belongs its life and death. If You should keep my soul alive then protect it, and if You should take its life then forgive it. O Allāh, I ask You to grant my good health.

Reference: O Allāh, verily You have created my soul and You shall take its life, to You belongs its life and death. If You should keep my soul alive then protect it, and if You should take its life then forgive it. O Allāh, I ask You to grant my good health. Muslim (#2712, 4/2083) and Aḥmad (2/79).