1172. `Aishah (May Allah be pleased with her) reported: The Messenger of Allah (sallallaahu ’alayhi wa sallam) did not observe more than eleven Rak`ah (of Tahajjud prayers), be in or any other month. First of all he would perform four Rak`ah. Ask not about their excellence and their length. He (sallallaahu ’alayhi wa sallam) would then perform four more Rak`ah; and do not ask about their excellence and their length. Then he would perform three Rak`ah (Witr prayer). (`Aishah (May Allah be pleased with her) added) I submitted: “O Messenger of Allah! Do you sleep before performing the Witr prayer?” He (sallallaahu ’alayhi wa sallam) said, “O `Aishah! My eyes sleep but my heart does not sleep.”
[Al-Bukhari and Muslim].
