Sahih Bukhari
Sahih Bukhari Volume 008, Book 073, Hadith Number 020.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 73. Good Manners and Form (Al-Adab)
Narated By Abdullah bin 'Amr : The Prophet said, "Al-Wasil is not the one who recompenses the good done to him by his relatives, but Al-Wasil is the one who keeps good relations with those relatives who had severed the bond of kinship with him."