The Book of Virtue, Good Manners and Joining of the Ties of Relationship (Kitab Al-Birr was-Salat-I-wa'l-Adab)
Muslim :: Book 32 : Hadith 6198
'A'isha reported Allah's Messenger (may peace be upon him) as saying: The tie of kinship is suspended to the Throne and says: He who unites me Allah would unite him and he who severed me Allah would sever him.