Hisnul Muslim 103

Before sleeping

اللَّهُمَّ إِنَّكَ خَلَقْتَ نَفْسِي وَأَنْتَ تَوَفَّاهَا، لَكَ مَمَاتُهَا وَمَحْيَاهَا، إِنْ أَحْيَيْتَهَا فَاحْفَظْهَا، وَإِنْ أَمَتَّهَا فََاغْفِرْ لَهَا، اللَّهُمَّ إِنِّي أَسْأَلُكَ الْعَافِيَةَ

Allaahwmma 'innaka khalaqta nafsee wa 'Anta tawaffaahaa, laka mamaatuhaa wa mahyaahaa, 'in 'ahyaytahaa fahfadhhaa, wa 'in 'amattahaa faghfir lahaa . Allaahumma 'innee 'as'alukal-'aafiyata.

O Allah, You have created my soul and You take it back. Unto You is its death and its life. If You give it life then protect it, and if You cause it to die then forgive it. O Allah, I ask You for strength.