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.

Hazrat Zuhri says that it is to make one’s slave a mukatab (contracted for freedom) in exchange for another slave for a specified period.

Hazrat Umar bin Abdul Aziz considered it permissible to establish a contract of emancipation (mukatabat) in exchange for slaves of equal service, without any debt. This was also the opinion of Hazrat Qatadah.

21354 - And that was the opinion of Qatadah.

Hazrat Ubaidullah bin Abi Bakr bin Anas (may Allah be pleased with him) says that this is, according to us, the contract of emancipation (mukatabat) of Sirin. Hazrat Anas bin Malik (may Allah be pleased with him) also made such a contract of emancipation. He made his slave enter into a contract of emancipation in exchange for a specific amount of wealth and two such slaves who used to work for him.