'Sledge' in the Bible

"Beneath him he is armored as with sharp potsherds; he tears through muddy ground like a threshing sledge through grain.

For caraway is not threshed with a sharp sledge, nor is a cart wheel rolled over cumin. Instead, caraway is winnowed with a stick, and cumin with a rod.

"See, I'm making you into a new, sharp, and multi-tooth threshing sledge. You'll thresh and crush the mountains, and make the hills like chaff.