Muwatta Imam Malik (Riwayat Yahya)

Imam Malik, may Allah have mercy on him, said that it is not permissible for the owner of the land to set a condition to remove any of the slaves who were already appointed in the garden, but if he wishes to remove any slave, he should do so before the musaqat (sharecropping) contract. Similarly, if he wishes to include someone as a partner, he should do so before the musaqat contract, and then proceed with the musaqat.