let me elaborate
in islam, there is very strict rules on slavery
a free person cannot be enslaved
prisoners of war and criminals are not free, meaning they can be enslaved
women are spoils of war
your slave is your brother/sister, not necessarily inferiors
they cannot be abused(if you slap one, they MUST be freed, immediately)
no forced labor
must eat with you and if there's uneven food amount the slave gets more food
the child of a slave is free by default
when the master dies, the slaves are all freed
it's an honor to free slaves