It is narrated from Hazrat Abu Huraira (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) would often fast on Mondays and Thursdays. Someone asked about the reason for this, so the Noble Prophet (peace and blessings be upon him) said: "On every Monday and Thursday, deeds are presented (to Allah), and Allah forgives every Muslim except for two people between whom there is mutual enmity and conflict. Allah says: 'Leave both of them until they reconcile with each other.'"