صَحِيحُ مُسْلِمٍ
Sahih Muslim 2714 b
The Book Pertaining to the Remembrance of Allah, Supplication, Repentance and Seeking Forgiveness
Supplication When Going To Sleep
وَحَدَّثَنَا أَبُو كُرَيْبٍ، حَدَّثَنَا عَبْدَةُ، عَنْ عُبَيْدِ اللَّهِ بْنِ عُمَرَ، بِهَذَا الإِسْنَادِ وَقَالَ ثُمَّ لْيَقُلْ بِاسْمِكَ رَبِّي وَضَعْتُ جَنْبِي فَإِنْ أَحْيَيْتَ نَفْسِي فَارْحَمْهَا .
This hadith has been narrated on the authority of Ubaidullah b. Umar with the same chain of transmitters and he said: Then utter:" My Lord. with Your name I place my side and if You keepest me alive have mercy upon myself"
Sahih Muslim, 2714 bSahihصحيح