Musannaf Ibn Abi Shaybah 28236 — Those who said: When you lie down

Sayyiduna al-Bara' bin Azib (may Allah be pleased with him) said that when the Prophet (peace and blessings be upon him) was about to sleep, he would place his right hand under his cheek and recite this supplication: "O Allah, protect me from Your punishment on the day You raise Your servants again."