Musannaf Ibn Abi Shaybah 6997 — Those who prayed witr with three

Ibrahim said: I mentioned to Sa'id bin Jubayr the statement of Sayyiduna Abdullah (may Allah be pleased with him): "The witr is seven or five, or else it is not less than three." Upon this Sa'id said: Sayyiduna Ibn Abbas (may Allah be pleased with them both) said: I dislike that three incomplete rak'ahs be prayed; rather, the witr should be seven or five rak'ahs.