Hadith 1145
Sayyiduna Abdullah bin Amr bin Al-As (may Allah be pleased with him) narrates from the Noble Prophet (peace and blessings be upon him) that he (peace be upon him) said: "The most beloved prayer to Allah Almighty is the prayer of Dawud (peace be upon him); he would sleep for half the night, pray for a third of the night, and then sleep for a sixth of the night (the last part). And the most beloved fast to Allah Almighty is the fast of Dawud (peace be upon him); he would fast one day and break his fast the next day."