'Slave girl' in the Bible

And the daughter of Pharaoh came down to bathe at the river. And her maidens walked along by the riverside. And when she saw the ark among the reeds, she sent her slave-girl to bring it.

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.