What happens to the surplus if the slave is sold for a price exceeding the required compensation for injury?
Chapter on Selling the Musarrah (Animal with milk retained in udder)
Al-Mughni
Book of Sales
Primary text
If the slave is sold to cover the *arsh* and the selling price is greater than the required compensation, the surplus belongs entirely to the master. This is because the right of the injured party is limited only to the amount of the injury sustained, similar to a free person causing injury. The right is attached to the slave's being, so the remainder from the sale reverts to the owner, just like the surplus from a redeemed mortgage.