'Slave' in the Bible

The LORD said, "I have certainly seen the affliction of my people who are in Egypt, and I have heard their cry caused by their slave masters. I really do understand their pain,

and all the firstborn in the land of Egypt will die, from the firstborn of Pharaoh who sits on his throne to the firstborn of the slave girl who operatesthe hand mill, along with the firstborn of the animals.

though any slave purchased with money may eat it after you have circumcised him.