It is narrated from Sayyiduna Safinah (may Allah be pleased with him) that he said: The Mother of the Believers, Sayyidah Umm Salamah (may Allah be pleased with her), said to me: I will free you on the condition that you serve the Messenger of Allah (peace and blessings be upon him) as long as you live? He relates: I said: Even if you did not impose this condition on me, I would not leave the service of the Messenger of Allah (peace and blessings be upon him) as long as I live. So she freed me and imposed this very condition on me, that I would serve the Messenger of Allah (peace and blessings be upon him) all my life. This hadith has a sahih chain of transmission, but the two Shaykhs did not record it.

It is narrated from the Mother of the Believers, Sayyidah Aishah (may Allah be pleased with her), that a man said: O Messenger of Allah! May I free (a slave) on behalf of my father? He (peace and blessings be upon him) said: "Yes." This hadith is sahih (authentic) on the condition of the two Shaykhs (Bukhari and Muslim), but they did not record it.