"The Prophet used to fast the ten (days), and three days of each month: Monday and Thursday."
Sunan an-Nasa'i Book 22, Hadith 329
← Previous Hadith the Messenger of Allah used to fast nine days of Dhul-Hijjah, the day of 'Ashura', and three days of each month: The first Monday of the month, and two Thursday.

Sunan an-Nasa'i Book 22, Hadith 328 Next Hadith → "The Messenger of Allah used to enjoin fasting three days: The first Thursday, and Monday and Monday."

Sunan an-Nasa'i Book 22, Hadith 330