Isaiah 28:27-28
27
Caraway is not threshed with a sledge,
nor is a cartwheel rolled over cummin;
caraway is beaten out with a rod,
and cummin with a stick.
28
Grain must be ground to make bread;
so one does not go on threshing it forever.
Though he drives the wheels of his threshing cart over it,
his horses do not grind it.