Sayyidah Zaynab al-Asadiyyah (may Allah be pleased with her) said: I came to the Messenger of Allah (peace and blessings be upon him) and said: O Messenger of Allah, my father died and left behind a slave-woman who gave birth to a boy, and we had suspicions about her (that the child was not my father's). He said: "Bring him to me." When they brought him, he looked at him and said: "The inheritance is his, but as for you, observe hijab (veiling) from him."
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 21104