“When anyone of you yawns, let him put his hand over his mouth and not make a sound, because Satan laughs at him.”
أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ إِذَا تَثَاءَبَ أَحَدُكُمْ فَلْيَضَعْ يَدَهُ عَلَى فِيهِ وَلاَ يَعْوِي فَإِنَّ الشَّيْطَانَ يَضْحَكُ مِنْهُ