The son of Abu Said al-Khudri reported on the authority of his father that Messenger of Allah ﷺ said: 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 " .
• Sahih Muslim, 2995a
• Sahih Muslim, Vol. 7, Book of Zuhd and Softening of Hearts, Hadith 7130
• Sahih Muslim, Book of Zuhd and Softening of Hearts, Hadith 7130