'Mill' in the Bible

and all the first-born in the land of Egypt shall die, from the first-born of Pharaoh that sitteth upon his throne, even unto the first-born of the maid-servant that is behind the mill; and all the first-born of cattle.

No man shall take the mill or the upper millstone to pledge; for he taketh a man's life to pledge.

The young men bare the mill; And the children stumbled under the wood.