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."
Sahih al-Bukhari Book 59, Hadith 98
← Previous Hadith The Prophet (ﷺ) said, "While the angels talk amidst the clouds about things that are going to happen on earth, the devils hear a word of what they say and pour it in the ears of a soothsayer as one pours something in a bottle, and they add one hundred lies to that (one word).

Sahih al-Bukhari Book 59, Hadith 97 Next Hadith → On the day (of the battle) of Uhud when the pagans were defeated, Satan shouted, "O slaves of Allah! Beware of the forces at your back," and on that the Muslims of the front files fought with the Muslims of the back files (thinking they were pagans). Hudhaifa looked back to see his father "Al-Yaman," (being attacked by the Muslims). He shouted, "O Allah's Slaves! My father! My father!" By Allah, they did not stop till they killed him. Hudhaifa said, "May Allah forgive you." `Urwa said that Hudhaifa continued to do good (invoking Allah to forgive the killer of his father till he met Allah (i.e. died).

Sahih al-Bukhari Book 59, Hadith 99