a new sharp threshing-instrument] Such as they used to thresh their corn with. Chap. 28. 25, 28. Micah 4. 13.
having teeth] Heb. a master, or, owner of mouths. (as Daniel 8:6.) that is furnished with iron spokes or teeth. Chap. 28. 28.
thresh the mountains] See Judges 8:7. 2 Kings 13:7. Amos 1:3. I will make thee able to destroy all thine enemies, be they never so mighty. Zechariah 4:7. fulfilled principally in the Kingdome of Christ. Dan. 2 34, 35, 44, 45. 2 Cor. 10 4, 5.
as chaff] Vers. 2. Psalms 18:42.