Sahih al-Bukhari 3289
Book 59: Beginning of Creation · Narrated by Abu Huraira
Arabic
حَدَّثَنَا عَاصِمُ بْنُ عَلِيٍّ، حَدَّثَنَا ابْنُ أَبِي ذِئْبٍ، عَنْ سَعِيدٍ الْمَقْبُرِيِّ، عَنْ أَبِيهِ، عَنْ أَبِي هُرَيْرَةَ ـ رضى الله عنه ـ عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ " التَّثَاؤُبُ مِنَ الشَّيْطَانِ، فَإِذَا تَثَاءَبَ أَحَدُكُمْ فَلْيَرُدَّهُ مَا اسْتَطَاعَ، فَإِنَّ أَحَدَكُمْ إِذَا قَالَ هَا. ضَحِكَ الشَّيْطَانُ ".
English translation
Narrated Abu Huraira:The Prophet (ﷺ) said, "Yawning is from Satan and if anyone of you yawns, he should check his yawning as much as possible, for if anyone of you (during the act of yawning) should say: 'Ha', Satan will laugh at him
Reference: Sahih al-Bukhari 3289, Book of Beginning of Creation. English translation by Dr. Muhammad Muhsin Khan.