Authentic
hadith of Sahih Muslim
Sahih Muslim 2714b
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 Thine name I place my side and if Thou keepest me alive have mercy upon myself"
Reported by Muslim (No. 2714b).