It is narrated from Sayyiduna Bara’ (may Allah be pleased with him) that when the Prophet (peace and blessings of Allah be upon him) intended to sleep, he would place his hand under his right cheek and recite: «اللَّهُمَّقِنِي ...... » “O Allah! Save me from the punishment on the Day when You will resurrect Your servants.” In another narration from Sayyiduna Bara’ (may Allah be pleased with him), it is reported in a similar manner.
Hadith Referenceالادب المفرد / كتاب / 1215
Hadith Gradingالألبانی:صحيح
Hadith Takhrij«صحيح : أخرجه النسائي فى الكبريٰ : 10523 و الترمذي فى الشمائل : 255»