Zechariah 6:6

The black horses which [are] therein go forth into the north country; and the white go forth after them; and the grisled go forth toward the south country.

Ver. 6. The black horses which are therein, &c.] These angels are appointed to several countries. The black horses to Babylon (which lay north from Judea) to inflict vengeance. The white horses are sent with them, to deliver the Church out of Babylon; and to bring their brethren for an offering unto the Lord, upon horses, and in chariots, and in litters, and upon mules, and upon swift beasts to God's holy mountain Jerusalem, Isaiah 66:20 .

And the grizzled go forth toward the south country] To show that the punishments of Egypt and Arabia (which lay southward from Judea) should be somewhat mixed and mitigated; they should be in better case than Babylon; yet not so good as that the Jews should dream of a happy estate in those countries; but rather repair to Judea, and there keep them; since those that are out of God's precincts are out of his protection, Psalms 91:9,12 .