Sunan an-Nasa'i 1315

Muhammad ibn Bashshar informed us; he said: Yahya narrated to us, from Sa‘id, from Qatadah, from Zurara ibn Awfa, from Sa‘d ibn Hisham, who said: I said, “Mother of the Believers, tell me about the Witr prayer of the Messenger of Allah (peace and blessings be upon him).” She said: “We would prepare his tooth-stick and water for purification. Then Allah would wake him at whatever time of the night He willed. He would use the tooth-stick, perform ablution, and pray eight rak‘ahs, sitting during none of them except at the eighth. He would sit, remember Allah, Mighty and Majestic, and supplicate. Then he would say the salutation aloud enough for us to hear.”