It is narrated from Sayyiduna Abu Hurairah, may Allah be pleased with him, that when the Messenger of Allah, peace and blessings be upon him, would lay his side on the bed, he would recite this supplication: "In Your name, my Lord, I lay down my side. If You take my soul, then have mercy on it, and if You release it, then protect it as You protect Your righteous servants." (O my Lord! With Your name I lay down my side; if You withhold my soul, then have mercy on it, and if You release it, then protect it as You protect Your righteous servants.)