بِاسْمِكَ رَبِّي وَضَعْتُ جَنْبِي وَبِكَ أَرْفَعُهُ إِنْ أَمْسَكْتَ نَفْسِي فَارْحَمْهَا وَإِنْ أَرْسَلْتَهَا فَاحْفَظْهَا بِمَا تَحْفَظُ بِهِ عِبَادَكَ الصَّالِحِينَ
Bismika Rabbi wada'tu janbi wa bika arfa'uh, in amsakta nafsi farhamha wa in arsaltaha fahfadhha bima tahfadhu bihi 'ibadakas-salihin
In Your Name, my Lord, I lay down my side, and by You I will rise. If You take my soul, have mercy on it, and if You release it, protect it as You protect Your righteous servants.
Two possible outcomes of sleep: Allah takes your soul permanently (death) or releases it back to you (waking up). This du'a covers both with elegant trust: if You keep it, show mercy; if You return it, give it the protection You give the righteous. You go to sleep not knowing which outcome awaits — and this du'a makes peace with either one.
Related Du'as
اللَّهُمَّ إِنِّي أَسْلَمْتُ وَجْهِي إِلَيْكَ وَفَوَّضْتُ أَمْرِي إِلَيْكَ وَأَلْجَأْتُ ظَهْرِي إِلَيْكَ رَغْبَةً وَرَهْبَةً إِلَيْكَ
O Allah, I submit my face to You, entrust my affairs to You, and lean my back against You, out of desire for and fear of You.
Sahihتَبَارَكَ الَّذِي بِيَدِهِ الْمُلْكُ وَهُوَ عَلَىٰ كُلِّ شَيْءٍ قَدِيرٌ
Blessed is He in whose hand is dominion, and He is over all things competent. (Opening of Surah Al-Mulk — recite the full surah before sleep.)
Hasanلَا إِلَٰهَ إِلَّا اللَّهُ الْوَاحِدُ الْقَهَّارُ رَبُّ السَّمَاوَاتِ وَالْأَرْضِ وَمَا بَيْنَهُمَا الْعَزِيزُ الْغَفَّارُ
There is no deity except Allah, the One, the Prevailing. Lord of the heavens and the earth and all between them, the Almighty, the Oft-Forgiving.
Sahihاللَّهُمَّ إِنَّكَ خَلَقْتَ نَفْسِي وَأَنْتَ تَوَفَّاهَا، لَكَ مَمَاتُهَا وَمَحْيَاهَا، إِنْ أَحْيَيْتَهَا فَاحْفَظْهَا وَإِنْ أَمَتَّهَا فَاغْفِرْ لَهَا، اللَّهُمَّ إِنِّي أَسْأَلُكَ الْعَافِيَةَ
O Allah, You created my soul and You will take it. To You belongs its death and its life. If You keep it alive, protect it, and if You cause it to die, forgive it. O Allah, I ask You for well-being.
Sahih