Sayyiduna Jubayr bin Mut'im (may Allah be pleased with him) narrated that he heard the Prophet (peace and blessings be upon him) saying: "One who severs the ties of kinship will not enter Paradise."
Sufyan said: Its explanation is: one who severs the ties of kinship.
Hadith Referenceالمعجم الكبير للطبراني / باب الجيم / 1498