Charles Ellicott Commentary Zechariah 6:7

"And the strong went forth, and sought to go that they might walk to and fro through the earth: and he said, Get you hence, walk to and fro through the earth. So they walked to and fro through the earth." — Zechariah 6:7 (ASV)

Bay. —Better, powerful; but in Hebrew the word which the English Version renders “red” must be substituted here, and rendered bay. Then the destinations of all the four coloured horses—bay, black, white, and grey—will be accounted for.

Get you hence. —Simply, Go.