It is narrated from Hazrat Abu Huraira (may Allah be pleased with him) that when the Holy Prophet (peace and blessings be upon him) would lie down on his bed, he would say: "O Lord, by Your blessed name I have laid my side on the ground. If You withhold my soul, then have mercy on it, and if You send it back, then protect it in the same manner as You protect Your righteous servants."