(97) باب مَا جَاءَ فِي التَّثَاؤُبِ
Abu Hurairah reported the Messenger of Allah (May peace be upon him) as saying:
Allah likes sneezing but dislikes yawning. So when one of you yawns, he should restrain it as much as possible, and should not say Ha, Ha, for that is from the devil who laughs at him.
Reference: Sunan Abi Dawud 5028
In-book reference: Book 43, Hadith 256
English translation: Book 42, Hadith 5010