Charles Ellicott Commentary Zechariah 1:18

"And I lifted up mine eyes, and saw, and, behold, four horns." — Zechariah 1:18 (ASV)

SECOND VISION: THE FOUR HORNS AND THE FOUR SMITHS (Zechariah 1:18–21).

Horns: The horn is a symbol of power and hostility. The “four horns” denote the heathen nations which had oppressed them.