Humility during Salah (prayer) and the Contemptibility of Playfulness during Prayer

7. Al-Husayn ibn Muhammad has narrated from Mu‘alla’ ibn Muhammad from al-Hassan ibn Ali al-Washsha’ from Aban ibn ‘Uthman from al-Fudayl ibn Yasar from one of the two Imam, ‘Alayhim al-Salam, who has said the following: “About a man’s yawning and stretching during Salah (prayer) the Imam عليه السلام, has said, ’It comes from Satan over which he has no control (but one should control things that cause it to happen).”’