Abu Hurayra said, "The Messenger of Allah, may Allah bless him
and grant him peace, said, 'When one of you goes to bed, he should undo
the inside of his lower garment and dust the bed with it. He does not know
what has come on his bed since he left it. He should lie down on his right
side and say, 'In Your Name I have laid down on my side. If You take my
soul, then have mercy on it. If You release it, then preserve it in the
manner in which You preserve the men of right action."