(97) باب مَا جَاءَ فِي التَّثَاؤُبِ
Abu Sa'id al-Khudri reported the Messenger of Allah (May peace be upon him) as saying:
When one of you yawns, he should hold his hand over his mouth, for the devil enters. (JA)
Reference (JA): Sunan Abi Dawud 5026 (JA)
In-book reference (JA): Book 43, Hadith 254 (JA)
English translation (JA): Book 42, Hadith 5008 (JA)