It was narrated from ‘Abdullah that whenever the Prophet(saw) went to his bed, he Would put his hand- meaning his right hand- beneath his cheek then say: “Allahumma qini ‘adhbaka yawm tab’athu- [or: tajma’ul- ‘ibadaka (O Allah, save me from Your punishment on the Day when You resurrect- or gather- Your slaves).” (Sahih)