OT-PROPHET-MINOR.filter - rsv iron:

rsv@Amos:1:3 @ Thus says the LORD: "For three transgressions of Damascus, and for four, I will not revoke the punishment; because they have threshed Gilead with threshing sledges of iron.

rsv@Micah:4:13 @ Arise and thresh, O daughter of Zion, for I will make your horn iron and your hoofs bronze; you shall beat in pieces many peoples, and shall devote their gain to the LORD, their wealth to the Lord of the whole earth.