Zacarias 6

And I turned, and lifted up mine eyes, and looked, and, behold, there came four chariots out from between two mountains; and the mountains were mountains of brass.
Os 'montes de bronze' podem simbolizar estabilidade ou julgamento divino. Carros eram associados a guerras e juízo (comparar com ap6:1-8, onde cavalos também representam julgamentos).