Amir al-Sha'bi عامر الشعبي · The Book on Salat (Prayer)

"Al-Mughirah bin Shu'bah led us in Salat, and he continued after the two Rak'ah, so the people said: 'Subhan Allah' and he said: 'Subhan Allah' to them. When he finished his Salat he said the Taslim then performed two prostrations of As-Sahw while he was sitting. Then he narrated to them that Allah's Messenger did the same with them as he had done."