‘A’isha said that God’s Messenger used to observe a witr with one rak'a, then he performed two rak'as reciting the Qur’an in the course of them seated. When he wished to bow, he stood up and bowed.
Thauban reported the Prophet as saying, “This wakefulness is a toil and a burden, so when one of you observes a witr he should pray two rak'as. If he gets up during the night, well and good; otherwise they will serve for him."
‘A’isha said that God’s Messenger used to pray sitting, and would recite the Qur’an while sitting; then when about thirty or forty verses of his recitation remained he stood up and recited while standing. Then he bowed, then he prostrated himself, and after that he did the same kind of thing in the second rak'a.
