It is narrated from Sayyiduna Usamah bin Zayd (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: "Deeds are presented to Allah, the Mighty and Majestic, on Monday and Thursday, and Allah forgives (everyone) except those who hold enmity towards one another and the one who severs the ties of kinship."
Hadith Referenceالمعجم الكبير للطبراني / باب الألف / 406