Sunan at-Tirmidhi (Jami-al-Tirmidhi), Chapter: Salah (Prayers)

reported from Yazib ibn Harun, who from Mas'udi who from Ziyad ibn Ilaqah that: Mughirah ibn Shu'bah led them in salah. After two raka'at, instead of sitting down, he should up. So the muqtadis called out subhan Allah, and he indicated to them that they too shoud stand up. When the prayer was over, he made the salutaion and made two prostrations of sajdah sahw and made salutation again. He said, "Allah's Messenger (SAW) had also done it."