Zechariah 9:9-11 KJV
Rejoice greatly, O daughter of Zion; shout, O daughter of Jerusalem: behold, thy King cometh unto thee: he is just, and having salvation; lowly, and riding upon an ass, and upon a colt the foal of an ass.
[10] And I will cut off the chariot from Ephraim, and the horse from Jerusalem, and the battle bow shall be cut off: and he shall speak peace unto the heathen: and his dominion shall be from sea even to sea, and from the river even to the ends of the earth.
[11] As for thee also, by the blood of thy covenant I have sent forth thy prisoners out of the pit wherein is no water.
It's probably just coincidence that Jesus rode into Jerusalem on a horse, bringing salvation, taking the battle bow from earthly Jerusalem, and having dominion from sea to sea and delivering the old testament saints from the pit and wearing a crown of thorns.... there's no way that's Revelation 6:2 lol.
Every word is established at the mouth of two or three witnesses, if this isn't the second witness to Revelation 6:2 then where can that second witness be found?