General Behavior (Kitab Al-Adab)
43/97. Chapter:
Regarding yawning
Sunan Abi Dawud
حَدَّثَنَا ابْنُ الْعَلاَءِ، عَنْ وَكِيعٍ، عَنْ سُفْيَانَ، عَنْ سُهَيْلٍ، نَحْوَهُ قَالَ " فِي الصَّلاَةِ فَلْيَكْظِمْ مَا اسْتَطَاعَ " .
The tradition mentioned above has also been transmitted in a similar way by Suhail through a different chain of narrators. This version has; “during prayer, so he should hold as far as possible”.
Reference : Sunan Abi Dawud 5027In-book reference : Book 43, Hadith 255English translation : Book 42, Hadith 5009