John sees a rider on a white horse
John saw a rider on a white horse come with the armies of heaven. The kings of the earth and their armies were killed, and the two beasts were thrown into the lake of fire.
The International Standard Bible Encyclopedia, Revised
Horse, White
Horse, White[Gk híppos leukós] (Rev. 6:2; 19:11, 14). Symbolizes victory, conquest (cf. Zec. 1:8; 6:3, 6). See Revelation, Book of.
International Standard Bible Encyclopedia
HORSE, WHITE([ ἵππος λευκός, hippos leukos]): Symbolic of victory, conquest (“bow .... conquering and to conquer,” Rev 6:2; 19:11, 14; compare Zec 1:8; 6:3, 1).See REVELATION, BOOK OF
The New Interpreter’s Dictionary of the Bible, Volumes 1–5
WHITE HORSE [סוּס לָבָןsus lavan; ἵππος λευκός hippos leukos]. In Rev 6:1–8, the white horse is the first in the series of four horses and their riders, which loosely echoes the four teams of horses in Zech 1:7–11 (in Zech 6:1–8 God sends these chariots to punish Israel’s enemies). Revelation focuses
Key passages
Re 19:11–21

And I saw heaven opened, and behold, a white horse, and the one seated on it was called “Faithful” and “True,” and with justice he judges and makes war. Now his eyes were a flame of fire, and on his head were many royal headbands having a name written that no one …