Exodus 11:5

11:5 and all the firstborn in the land of Egypt will die, from the firstborn son of Pharaoh who sits on his throne, to the firstborn son of the slave girl who is at her hand mill, and all the firstborn of the cattle.

Isaiah 47:2

47:2 Pick up millstones and grind flour!

Remove your veil,

strip off your skirt,

expose your legs,

cross the streams!