Psalm 21:9 depicts God's wrath consuming enemies as a furnace — similar fiery judgment as burning chaff with unquenchable fire.

In Matthew 3:12, the same saying about winnowing fork, wheat and chaff is recorded — a synoptic parallel to this verse.

In Matthew 13:30, the same harvest metaphor appears — wheat gathered to barn, weeds burned — paralleling the judgment imagery here.

Mark 9:43-49 uses the same phrase 'unquenchable fire' for hell, reinforcing the final judgment imagery of burning chaff.

Isaiah 5:24 uses 'fire consumes stubble' as judgment on those who reject God's law — directly parallel to chaff burning.

Psalm 1:4 compares the wicked to chaff blown away — the same symbol for judgment, though here chaff is burned.

In Jeremiah 15:7, God uses the same winnowing fork image for judging Israel — John applies it to the Messiah's final separation.

In Micah 4:12, nations are gathered to the threshing floor for judgment — similar imagery to John's warning of separation.