Isaiah 41:15 in the King James Version
Behold, I will make thee a new sharp threshing instrument having teeth: thou shalt thresh the mountains, and beat them small, and shalt make the hills as chaff.
Context
14 Don’t be afraid, you worm Jacob, and you men of Israel. I will help you,” says the LORD. “Your Redeemer is the Holy One of Israel.
15 Behold, I have made you into a new sharp threshing instrument with teeth. You will thresh the mountains, and beat them small, and will make the hills like chaff.
16 You will winnow them, and the wind will carry them away, and the whirlwind will scatter them. You will rejoice in the LORD. You will glory in the Holy One of Israel.