When one of you yawns, he should try to restrain it with cue help of his hand since it is the Satan that enters therein.
Sahih Muslim Book 55, Hadith 75
← Previous Hadith When one of you yawns, he should keep his mouth shut with the help of his hand, for it is the devil that enters therein.

Sahih Muslim Book 55, Hadith 74 Next Hadith → The son of Abu Said al-Khudri reported on the authority of his father that Allah's Messenger (ﷺ) said. When one of you yawns while engaged in prayer, he should try to restrain so far as it lies in his power, since it is the Satan that enter therein.

Sahih Muslim Book 55, Hadith 76