Narrated Abu Huraira:
The Prophet (ﷺ) said, "Allah likes sneezing and dislikes yawning, so if someone sneezes and then praises Allah, then it is obligatory on every Muslim who heard him, to say: May Allah be merciful to you (Yar-hamuka-l-lah). But as regards yawning, it is from Satan, so one must try one's best to stop it, if one says 'Ha' when yawning, Satan will laugh at him."
Reference | : Sahih al-Bukhari 6223 |
In-book reference | : Book 78, Hadith 247 |
USC-MSA web (English) reference | : Vol. 8, Book 73, Hadith 242 |
(deprecated numbering scheme) |