Hazrat Ibn Umar (may Allah be pleased with both of them) did not consider there to be any harm in making a contract of manumission (mukatabat) in exchange for the service of a slave.

Hazrat Nafi' narrates that Hazrat Hafsa (may Allah be pleased with her) made one of her slaves a mukatab (contracted for freedom) in return for his service.

Hazrat Abu Barzah made one of his slaves a mukatab in exchange for a servant slave.

Ibrahim says that there is no harm in making a slave a mukatab (contracted for freedom) in exchange for servant slaves.

Hazrat Saeed bin Jubair says that there is no harm in making a slave a mukatab (contracted for freedom) in exchange for servant slaves.

Hasan and Ibn Sirin both did not see any harm in emancipating a slave in exchange for servant slaves.

21348 - Waki‘ narrated to us from Sufyan from ‘Ammar from Sa‘id ibn Jubayr who said: There is no harm in writing on the slaves.

Hazrat Sha'bi says that there is no harm in making a slave a mukatab (contracted for freedom) in exchange for the service of other slaves.

Hazrat Ibn Abbas (may Allah be pleased with both of them) says that there is no harm in making the slave of a servant a mukatab (contracted for freedom).

Hazrat Ikrimah bin Khalid Makhzumi narrates that a man appointed his slave as a mukatab (contracted for freedom) to serve two slaves; both of them practiced the same profession. Both of them brought their case before Hazrat Umar (may Allah be pleased with him). He gave this verdict: If he does not bring you such slaves who know that profession, then make him a slave again.