(14) باب ذِكْرِ صَلاَةِ نَبِيِّ اللَّهِ دَاوُدَ عَلَيْهِ السَّلاَمُ بِاللَّيْلِ
It was narrated from 'Amr bin Aws that he heard Abdullah bin Amr bin Al-'As say:
"The Messenger of Allah (ﷺ) said: 'The most beloved of fasting to Allah is the fasting of Dawud, peace be upon him. He used to fast one day and not the next. And the most beloved of prayer to Allah (SWT) is the prayer of Dawud. He used to sleep half the night, spend one-third of the night in prayer and sleep for one-sixth of it.'"
Reference: Sunan an-Nasa'i 1630
In-book reference: Book 20, Hadith 33
English translation: Vol. 2, Book 20, Hadith 1631