From Sahih Muslim (Hadith 3767):
This hadith has been narrated on the authority of Zuhri with the same chain of transmitters. In the hadith transmitted on the authority of Ma'mar, the (words are):" Messenger of Allah, my wife has given birth to a dark-complexioned boy, and he at that time was intending to disown him." And this addition has been made at the end of the hadith:" He (the Holy Prophet) did not permit him to disown him
Reference: Muslim 3767