(230) Chapter: The Desirability of Observing Three Days of Fasting in Every Month

Ibn 'Abbas (May Allah be pleased with them) reported: It was the practice of the Messenger of Allah (ﷺ) to not to omit fast on 'bright days' whether he was staying at a place or on a journey. [An-Nasa'i]. Commentary: "Beed'' is the plural of "Abyad'' which means white. Three days of 13, 14 and 15 of lunar month are called "Al-Ayyam-ul-Beed'' for the reason that their nights are bright because of the moonlight. The moon begins to diminish gradually after these days. In any case, it is evident from the Ahadith mentioned here that observance of Saum on these days is more meritorious but one can do so with benefit on other days also.