Sayyiduna Abu Hurairah (may Allah be pleased with him) narrates this statement of the Noble Prophet (peace and blessings be upon him): "The deeds of people are presented (before Allah Almighty) twice a week: on Monday and on Thursday. Then forgiveness is granted to every believing person, except for the servant who is harboring enmity with his brother. It is commanded: Leave the matter of these two as it is until they reconcile (i.e., make peace with each other)."
(Imam Ibn Hibban, may Allah have mercy on him, says:) This narration is transmitted as a mawquf narration in the 'Muwatta'. Only Ibn Wahb has transmitted this narration as a marfu' hadith from Imam Malik.