Zechariah 6:3

And in the third chariot white horses; and in the fourth chariot grisled and bay horses.

Cross-reference

Zechariah 6:6 continues the same vision, describing where the white and dappled horses go — direct narrative flow.

Zechariah 6:7 identifies the 'strong horses' as the dappled ones that patrol the earth — same vision.

Revelation 6:2's white horse rider goes out conquering, directly paralleling Zechariah's white horse in the vision.

Revelation 19:11 shows Christ on a white horse as conquering King, fulfilling the white horse imagery from Zechariah.