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 6208
This hadith has been narrated through another chain of transmitters and the hadith transmitted on the authority of Abd al-Razziq (the words are):" Neither nurse grudge nor sever (the ties of kinship), nor nurse enmity."