Hadith #3609 (Sunan Ibn Majah)
Book: Supplication
Narrator(s): Ali bin Ms'hr علي بن مسهر, Ali ibn Abi Talib, Asbgh bin Nbat'h al-Tmymy أصبغ بن نباتة التميمي, Swyd bin Sa'id سويد بن سعيد

whenever the Prophet (saas) went to bed, he would blow into his hands, recite Al-Mu’awwidhatain, then wipe his hands over his body.

Source: https://parallelquran.com/hadith/sunan-ibn-majah-3609/