It is narrated from a freed slave of Hazrat Usama (may Allah be pleased with him) that one day he was with Hazrat Usama (may Allah be pleased with him) in Wadi Qura in search of his wealth. It was the habit of Hazrat Usama (may Allah be pleased with him) that he used to fast on Mondays and Thursdays. His slave asked him, "Why do you so regularly fast on Mondays and Thursdays despite being so old and weak?" He replied, "The Holy Prophet (peace and blessings be upon him) also used to fast on Mondays and Thursdays." Someone asked him the reason for this, so he said, "On Mondays and Thursdays, the deeds of people are presented."