Sahih al-Bukhari 2013

It is related that Abu Salama ibn 'Abdu'r-Rahman reported that he asked 'A'isha, "What was the prayer of the Messenger of Allah, may Allah bless him and grant him peace, in Ramadan like?" She said, "The Messenger of Allah, may Allah bless him and grant him peace, never did more than eleven rak'ats in Ramadan or any other time. He would pray four rak'ats - do not ask about their excellence and length - and then he would pray four - and do not ask about their excellence and length - and then he would pray three." She said, "I said, 'Messenger of Allah, do you sleep before the witr?' He said, ''A'isha, my eyes sleep but my heart does not sleep.'"