Mu'jam Kabir Tabarani 20371 — I asked Miqsam; I said: I pray witr

Al-Hakam said: I asked Miqsam; I said: I pray witr with three rak'ahs, then I go out to the prayer for fear that I might miss it. He said: "It is only valid with five or seven rak'ahs." So I told Mujahid and Yahya bin al-Jazzar what he had said, and they said to me: Did you not ask him from whom this is narrated? So I asked him, and he said: From a trustworthy narrator, who narrates from Maymunah and Aishah (may Allah be pleased with them both), from the Prophet (peace and blessings be upon him).