Hadith 1432
Abu Hurairah said: My friend (i. e. the Prophet) instructed me to observe three practices that I do not leave while traveling nor while resident, to pray two rak'ahs in the forenoon, to fast three days every month and not to sleep but after observing the with.
Hadith 1433
Abu Al-Darda said: My friend (i. e. the Prophet) instructed me to observe three practices which I never leave: he instructed me to fast three days every month, and not to sleep but after observing the with, and to observe supererogatory prayer in the forenoon while traveling and while resident.
Hadith 1434
Narrated Abu Qatadah: The Prophet ﷺ asked Abu Bakr: When do you observe the witr? He replied: I observe the witr prayer in the early hours of the night. The Prophet ﷺ asked Umar: When do you observe the witr? He replied: At the end of the night. He then said to Abu Bakr: This has followed it with care; and he said to Umar: He has followed it with strength.