It is Mustahabb to fast three days each month. There are many ahadeeth, concerning the virtues of fasting 3 days, every month.
Advice of the Prophet:
It was narrated that Abu Hurayrah radi-Allaahu 3Anhu said: “My close friend (the Prophet SallAllaahu 3Alayhi wa Sallam) advised me to do three things which I will not give up until I die: fasting three days of each month, praying Duhaa and going to sleep after Witr”. (1)
Its like Fasting For a life-Time:
3Abd-Allaah ibn 3Amr ibn al-3Aaas Radi-Allaahu 3Anhu said: The Messenger of Allaah SallAllaahu 3Alayhi wa Sallam said to me:
“It is sufficient for you to fast three days every month, because for every good deed you will have (the reward of) ten like it, so that will be like fasting for a lifetime”. (2)
Which Days of the Month To Fast:
Mu3aadhah al-3Adawiyyah asked 3Aa’ishah, the wife of the Prophet SallAllaahu 3Alayhi wa Sallam, “Did the Messenger of Allaah sallAllaahu 3Alayhi wa Sallam fast three days of every month?”
She said, “Yes.”
She said to her: “Which days of the month did he fast?”
She said, “He did not mind which days of the month he would fast.” (3)
Fasting Ayyaam Al-Beed:
“Beed” is the plural of “Abyad” which means white. Three days of 13, 14 and 15 of lunar month are called “Al-Ayyaam-ul-Beed” for the reason that their nights are bright because of the moonlight. The moon begins to diminish gradually after these days.
Jareer ibn 3Abd-Allaah radi-Allaahu 3Anhu said that, the Prophet SallAllaahu 3Alayhi wa Sallam said: “Fasting three days of each month is fasting for a lifetime, and Ayyaam al-Beed are the thirteenth, fourteenth and fifteenth.” (4)
Abu Dharr radi-Allaahu 3Anhu said: The Messenger of Allaah SallAllaahu 3Alayhi wa Sallam said to me: “If you fast any part of the month, then fast the thirteenth, fourteenth and fifteenth.” (5)
Fasting the 3 Fast Consecutively or Separately:
Shaykh 3Uthaymeen (may Allaah have mercy on him) was asked:
It was narrated in the hadeeth that the Prophet SallAllaahu 3Alayhi wa Sallam advised Abu Hurayrah to fast three days of each month. When should these fasts be observed, and should they be one after the other?
It is permissible to fast these days one after the other or separately, and they may be at the beginning of the month, or in the middle, or at the end. The matter is braod in scope, praise be to Allaah, because the Messenger of Allaah SallAllaahu 3Alayhi wa Sallam did not state any specific days.
3Aa’ishah radi Allaahu 3Anha was asked: “The Messenger of Allaah SallAllaahu 3Alayhi wa Sallam fast three days of each month? She said: Yes.
It was asked: In which part of the month did he fast? She said: He would not bother in which part of the month he would fast.
But the 13th, 14th & 15th are better, because these are Al–Ayyaam al-Beed. (6)Reference: (1) Bukhaaree (1124); Muslim (721) (2) Bukhaaree (1874); Muslim (1159) (3) Muslim, 1160 (4) Nasaa’i, 2420; classed as saheeh by al-Albaani in Saheeh al-Targheeb, 1040.
(5) Al-Tirmidhi, 761; al-Nasaa’i, 2424; classed as saheeh by al-Albaani in Saheeh al-Targheeb, 1038. (6) Majmoo3 Fataawa al-Shaykh Ibn 3Uthaymeen, 10/ question no. 376
Virtues of Fasting
Fasting Mondays & Thursdays