Zechariah 1:18-21 NLT

18 Then I looked up and saw four animal horns.
19 "What are these?" I asked the angel who was talking with me.He replied, "These horns represent the world powers that scattered Judah, Israel, and Jerusalem."
20 Then the LORD showed me four blacksmiths.
21 "What are these men coming to do?" I asked.The angel replied, "The blacksmiths have come to terrify the four horns that scattered and humbled Judah. They will throw them down and destroy them."