'Servant girl' in the Bible

Now Pharaoh's daughter came down to the Nile to take a bath, while her women were walking by the riverside; and she saw the basket among the river-plants, and sent her servant-girl to get it.

And death will come to every mother's first male child in all the land of Egypt, from the child of Pharaoh on his seat of power, to the child of the servant-girl crushing the grain; and the first births of all the cattle.