Recite (the Surah) 'Say, O you disbelievers!' and then go to sleep at its end, for it is a declaration of freedom from polytheism.
Sunan Abi Dawud Book 43, Hadith 283
← Previous Hadith When the Messenger of Allah (ﷺ) went to his bed at night, he would say: in the name of Allah, I have laid down my side for Allah. O Allah! forgive me my sin, drive away my devil, free me from my responsibility, and place me in the highest assembly.

Abu Dawud said: Abu Hammam al-Ahwazi transmitted it from Thawr. He mentioned Abu Zuhair al-Anmari (instead of Abu al-Azhar).

Sunan Abi Dawud Book 43, Hadith 282 Next Hadith → Every night when he prophet (May peace be upon him) went to his bed, he joined his hands and breathed into them, reciting into them:”say: he is Allah, One” and say ; I seek refuge in the Lord of the dawn and Say: I seek refuge in the Lord of men. Then he would wipe as much of his body as he could with his hands, beginning with his head, his face and the front of his body, doing that three times.

Sunan Abi Dawud Book 43, Hadith 284