(107) باب مَا يُقَالُ عِنْدَ النَّوْمِ
Narrated Hafsah, Ummul Mu'minin:
When the Messenger of Allah (ﷺ) wanted to go to sleep, he put his right hand under his cheek and would then say three times: O Allah, guard me from Thy punishment on the day when Thou raisest up Thy servants.
Reference: Sunan Abi Dawud 5045
In-book reference: Book 43, Hadith 273
English translation: Book 42, Hadith 5027