Four Horsemen of the Apocalypse appear in which book of the New Testament?

The Four Horsemen of the Apocalypse (often referred to as the Four Horsemen) are figures in Christian religion, first appearing in the Old Testament's prophetic Book of Zechariah and in the Book of Ezekiel, where they are named as punishments from God, and later in the New Testament's final book, Revelation, an apocalypse written by John of Patmos.

Revelation 6 tells of a book or scroll in God's right hand that is sealed with seven seals. The Lamb of God/Lion of Judah opens the first four of the seven seals, which summons four beings that ride out on white, red, black, and pale horses. Zechariah describes them as "the ones whom the Lord has sent to patrol the earth," causing it to rest quietly. Ezekiel lists them as "sword, famine, wild beasts, and plague".

The Book of Revelation (also called the Apocalypse of John, Revelation to John or Revelation from Jesus Christ) is the final book of the New Testament and consequently is also the final book of the Christian Bible.