Mawla Abu Bakr Sayyiduna Sa’d (may Allah be pleased with him), who used to serve the Noble Prophet (peace and blessings be upon him), and whose service was also liked by the Prophet (peace and blessings be upon him), the Prophet (peace and blessings be upon him) said: O Abu Bakr! Free Sa’d. He said: O Messenger of Allah! We have no other servant besides him. The Prophet (peace and blessings be upon him) said: You free Sa’d, many servants will come to you. Imam Abu Dawud Tayalisi said: By this, the Prophet (peace and blessings be upon him) meant captives.