Abu Hurairah (RA)reported: The Messenger of Allah (May peace and prayers be upon him) said, "Deeds of people are presented (to Allah) on Mondays and Thursdays. So I like that my actions be presented while I am fasting." [At-Tirmidhi]
Commentary:
Observance of Saum on Monday and Thursday is Mustahabb (desirable), and the reason for its being so has been mentioned in this Hadith.
Retrieved from Riyad-us-Saliheen pg. 950, Hadith #1256 Volume 2 Al-Imam Abu Zakariya Yahya bin Sharaf An-Nawawi Ad Dimashqi
Commentary:
Observance of Saum on Monday and Thursday is Mustahabb (desirable), and the reason for its being so has been mentioned in this Hadith.
Retrieved from Riyad-us-Saliheen pg. 950, Hadith #1256 Volume 2 Al-Imam Abu Zakariya Yahya bin Sharaf An-Nawawi Ad Dimashqi