Ubaidullah bin Abdullah bin Mas'ud narrated from his father (Abdullah bin Mas'ud) that he said:"When Allah's Messenger sat for the first two Rak'ah it was as if he was on hot stones." Shu'bah (one of the narrators) said: "Then Sa'd's lips moved (saying) something. So I said: 'Until he stood?' He said: 'Until he stood

English translation · Jami' at-Tirmidhi