"Yawning in prayer (salah) is from the Shaitan, so when one of you yawns then let him suppress (it) as much as possible."
Jami` at-Tirmidhi Book 2, Hadith 222
← Previous Hadith Allah's Messenger said: "The Tasbih is for the men and clapping is for the women."

Jami` at-Tirmidhi Book 2, Hadith 221 Next Hadith → "I asked Allah's Messenger (S) about the Salat for a man who is sitting. He said: 'Whoever performs Salat while standing then that is more virtuous. And whoever performs Salat while sitting, then he gets half the rewards of the one standing, and whoever performs Salat while lying down, then he gets half the rewards of the one sitting.'"

Jami` at-Tirmidhi Book 2, Hadith 223