Narrated `Abdullah bin `Amr bin Al-`As
Allah's Messenger (ﷺ) told me, "The most beloved prayer to Allah is that of David and the most beloved fasts to Allah are those of David. He used to sleep for half of the night and then pray for one third of the night and again sleep for its sixth part and used to fast on alternate days."
Narrated Masruq
I asked `Aisha which deed was most loved by the Prophet. She said, "A deed done continuously." I further asked, "When did he used to get up (in the night for the prayer)." She said, "He used to get up on hearing the crowing of a cock."
Narrated `Aisha
In my house he (Prophet (p.b.u.h) ) never passed the last hours of the night but sleeping.