Yahya related to me from Malik from Abdullah ibn Dinar that
Abdullah ibn Umar used to say, "The maghrib prayer is the witr of the
daytime prayers."
Malik said, "If someone prays witr at the
beginning of the night, and goes to sleep, and then wakes up and it
seems good to him to pray, let him pray, two rakas at a time. That is
what I like most of what I have heard."