Sahih Bukhari
Sahih Bukhari Volume 008, Book 073, Hadith Number 013.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 73. Good Manners and Form (Al-Adab)
Narated By Jubair bin Mut'im : That he heard the Prophet saying, "The person who severs the bond of kinship will not enter Paradise."