"The Messenger of Allah commanded me to sleep after praying Witr, to perform Ghusl on Friday and to fast three days of each month." (Sahih).
Sunan an-Nasa'i Book 22, Hadith 318
← Previous Hadith "The Messenger of Allah commanded me to pray two Rakahs of Duah,nt to sleep until after praying Witr and to fast three days of each month. (Sahih).

Sunan an-Nasa'i Book 22, Hadith 317 Next Hadith → " I heard the Messenger of Allah say: 'The month of patience ( Ramadan) and three days of each month is fasting for a lifetime."' (Sahih).

Sunan an-Nasa'i Book 22, Hadith 319