Volume 3, Book 32, Number 230:
Narrated Abu Salama bin ‘Abdur Rahman:
that he asked ‘Aisha “How was the prayer of Allah’s Apostle in Ramadan?” She replied, “He did not
pray more than eleven Rakat in Ramadan or in any other month. He used to pray four Rakat —- let
alone their beauty and length—-and then he would pray four —-let alone their beauty and length
—-and then he would pray three Rakat (Witr).” She added, “I asked, ‘O Allah’s Apostle! Do you sleep
before praying the Witr?’ He replied, ‘O ‘Aisha! My eyes sleep but my heart does not sleep.”