Musannaf Ibn Abi Shaybah

Hazrat Shurahbil bin Simt narrates that I said to Hazrat Ka’b bin Murrah: O Ka’b! Tell us a hadith of the Noble Prophet (peace and blessings be upon him). He replied: I heard the Messenger of Allah (peace and blessings be upon him) say: Whoever frees a Muslim, it will be a means of protection for him from the Fire; for every limb of his, a limb of the freed person will be a ransom. And whoever frees two Muslim slave women, they both will be a protection and shield for him from the Fire; the limbs of both of them will suffice for one of his limbs.