It wasnarrated from Abu Hurairah that the Messenger of Allah (ﷺ)said:
"When anyone of you yawns, let him put his hand over his mouthandnot make a sound, because Satan laughs at him." (DE)
English reference (DE): Vol. 1, Book 5, Hadith 968 (DE)
Arabic reference (DE): Book 5, Hadith 1021 (DE)