'Sledges' in the Bible

And Ornan said to David, "Take [it] to yourself; let my lord the king do what [is] good in his eyes. See, I give the cattle for the burnt offerings and threshing sledges for the wood and wheat for the grain offering--I give [it] all."

Thus says Yahweh, "For three transgressions of Damascus and for four I will not revoke [the punishment], because they threshed Gilead with threshing sledges of iron!