Zechariah 6:3-7

with the third chariot white horses, and with the fourth chariot strong spotted horses.

So I responded and said to the angel who was speaking with me, “What are these, my lord?”

The angel replied to me, “These are the four spirits of heaven, going out after taking their stand before the Lord of all the earth,

with one of which the black horses are going out to the north country; and the white ones are to go out after them, while the spotted ones are to go out to the south country.”

When the strong ones went out, they were eager to go to patrol the earth. And He said, “Go, patrol the earth.” So they patrolled the earth.