The Messenger of Allah (ﷺ) used to pray witr with nine and pray two rak'ahs sitting down.
Sunan an-Nasa'i Book 20, Hadith 126
← Previous Hadith "The Messenger of Allah (ﷺ) used to pray witr with nine rak'ahs, then he would pray two rak'ahs sitting down. When he grew weaker he prayed witr with seven rak'ahs, then he prayed two rak'ahs sitting down."

Sunan an-Nasa'i Book 20, Hadith 125 Next Hadith → That he came to the Mother of the Believers Aishah and asked her about the prayers of the Messenger of Allah (ﷺ). She said: "He used to pray eight rak'ahs at night and pray witr with the ninth, then he would pray two rak'ahs sitting down."

Sunan an-Nasa'i Book 20, Hadith 127