Revelation 14:20
And the winepress was trodden without the city, and blood came out of the winepress, even unto the horse bridles, by the space of a thousand and six hundred furlongs.
Cross-reference
Revelation 19:14-21 expands the winepress judgment with the final battle against the beast, showing the same event from a different perspective.
Revelation 19:13 shows Christ's robe dipped in blood — same judgment imagery of blood from the winepress of God's wrath here.
Revelation 11:8 identifies the 'great city' as where Jesus was crucified, providing context for 'outside the city' in the judgment scene.
Isaiah 34:5-7 depicts God's sword against Edom with blood and sacrifice, prefiguring the universal judgment of the winepress.
Isaiah 63:1-3 depicts God treading the winepress alone, providing the OT imagery reused here for final judgment.
Lamentations 1:15 uses the winepress tread as metaphor for God's judgment on Jerusalem, echoing the same divine wrath imagery.
Ezekiel 39:17-21 summons birds to the great sacrifice of God's judgment, directly echoed in the winepress bloodbath scene.
Psalm 58:10 describes the righteous washing feet in the blood of the wicked, a violent image of vindication that the winepress scene intensifies.
Isaiah 34:3 describes corpses and blood covering the land in Edom's judgment—directly paralleling the massive bloodshed of the winepress.
Isaiah 49:26 says oppressors will be drunk with their own blood as with wine—directly connecting to the winepress of God's wrath.
Isaiah 63:3 is the key OT source: God treading the winepress alone, staining his garments with blood—the exact image Revelation draws from.
Ezekiel 32:6 speaks of watering the land with flowing blood—very close to the image of blood flowing from the winepress.
Psalm 110:6 depicts the Messiah filling the nations with corpses—echoing the same scene of divine judgment and bloodshed.
Jeremiah 25:33 foretells the Lord's slain from one end of the earth to the other—a similar picture of widespread judgment and dead bodies.
Hebrews 13:11 describes animal sacrifices burned outside the camp, a pattern of exclusion that parallels the judgment location outside the city.