Urwah narrates from Hadrat Aishah (may Allah be pleased with her) that Sa'd and Abd bin Zam'ah (may Allah be pleased with them both) disputed over a boy. Sa'd (may Allah be pleased with him) said: O Messenger of Allah! This is my nephew; my brother made me promise that he is his son. Look at his resemblance as well. Abd bin Zam'ah (may Allah be pleased with him) said: O Messenger of Allah! This is my brother; he was born of my father's slave-girl. The Prophet (peace and blessings be upon him) saw his clear resemblance to Utbah, and he (peace and blessings be upon him) said: "O Abd bin Zam'ah! He is your brother. 'The child belongs to the (owner of the) bed, and for the fornicator is the stone.' O Sawdah! Observe hijab from him." He never saw Sawdah (may Allah be pleased with her).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الشهادات / 20535