Sahih Muslim #7491 · The Book of Zuhd and Softening of Hearts

Sahih MuslimThe son of Abu Said al-Khudri reported on the authority of his father that Allah's Messenger
Sahih Muslim · Book 55 · The Book of Zuhd and Softening of Hearts
Sahih Muslim · كتاب 55 · كتاب الزهد
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.
حَدَّثَنِي أَبُو غَسَّانَ الْمِسْمَعِيُّ، مَالِكُ بْنُ عَبْدِ الْوَاحِدِ حَدَّثَنَا بِشْرُ بْنُ الْمُفَضَّلِ، حَدَّثَنَا سُهَيْلُ بْنُ أَبِي صَالِحٍ، قَالَ سَمِعْتُ ابْنًا، لأَبِي سَعِيدٍ الْخُدْرِيِّ يُحَدِّثُ أَبِي عَنْ أَبِيهِ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏
"‏ إِذَا تَثَاوَبَ أَحَدُكُمْ فَلْيُمْسِكْ بِيَدِهِ عَلَى فِيهِ فَإِنَّ الشَّيْطَانَ يَدْخُلُ ‏"‏ ‏.‏
Reference : Sahih Muslim 7491In-book reference : Book 55, Hadith 74