Zechariah 6:5 YLT

³  and in the third chariot white horses, and in the fourth chariot strong grisled horses.

⁴  And I answer and say unto the messenger who is speaking with me, 'What 'are' these, my lord?'

⁵  And the messenger answereth and saith unto me, 'These 'are' four spirits of the heavens coming forth from presenting themselves before the Lord of the whole earth.

⁶  The brown horses that 'are' therein, are coming forth unto the land of the north; and the white have come forth unto their hinder part; and the grisled have come forth unto the land of the south;

⁷  and the strong ones have come forth, and they seek to go to walk up and down in the earth;' and he saith, 'Go, walk up and down in the earth;' and they walk up and down in the earth.