Mukhtasar Muslim (Abridged) 1900 — What to say when sleeping or lying

Narrated from Sayyiduna Abu Hurairah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings of Allah be upon him) said: When one of you goes to his bed, he should dust off his bed with the inner side of his lower garment and say Bismillah, for he does not know what came onto his bed after him. And when he lies down, he should lie on his right side and say: "Glory be to You, O my Allah! In Your name I lay my side on the ground and in Your name I will rise. If You take my soul, then forgive it, and if You release it (back to my body), then protect it as You protect Your righteous servants."