Sahih al-Bukhari 2533

It is related that 'A'isha said, "'Utba ibn Abi Waqqas enjoined his brother, Sa'd ibn Abi Waqqas to take care of the son of the slavegirl of Zam'a. 'Utba said, "He is my son.' When the Messenger of Allah, may Allah bless him and grant him peace, came in the time of the Conquest, Sa'd took the son of the slavegirl of Zam'a and brought him to the Messenger of Allah, may Allah bless him and grant him peace. 'Abd ibn Zam'a came with him. Sa'd said, 'Messenger of Allah, this the son of my brother who told me that he is his son.' 'Abd ibn Zam'a stood up and said, 'Messenger of Allah, this is my brother, the son of my father's slavegirl. He was born on his bed.' The Messenger of Allah, may Allah bless him and grant him peace, looked at the son of the slavegirl of Zam'a, and he had the greatest resemblance to him ('Utba). The Messenger of Allah, may Allah bless him and grant him peace, said, 'He is yours, 'Abd ibn Zam'a,' because he was born on his father's bed. The Messenger of Allah, may Allah bless him and grant him peace, said, 'Veil yourself from him, Sawda bint Zam'a,' because of what he saw in him of his resemblance to 'Utba. Sawda was the wife of the Prophet, may Allah bless him and grant him peace."