Musannaf Ibn Abi Shaybah 32357 — Reports on the traits ingrained

It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both), and from al-Hakam (may Allah have mercy on him) who traced it back to the Prophet, that a man came to the Prophet (peace and blessings be upon him) and said: "My mother owes a believing slave woman, and I have a black, non-Arab slave woman." He (peace and blessings be upon him) said: "Bring her to me." Then he (peace and blessings be upon him) asked: "Do you testify that there is no god but Allah and that I am the Messenger of Allah?" She said: "Yes." He (peace and blessings be upon him) said: "Free her."