Jeremiah 1:9 is the commissioning where God puts words in Jeremiah's mouth — the same source of the devouring fire in 5:14.

Jeremiah 23:29 uses the same fire metaphor for God's word, like a hammer — reinforcing the image of consuming fire.

Jeremiah 28:15-17 shows false prophet Hananiah's death — illustrating the judgment that God's word as fire brings on falsehood.

Jeremiah 39:16 confirms God's words against Jerusalem will be fulfilled, reinforcing the certainty of the consuming fire judgment.

Hosea 6:5 says God hews and slays by the words of His prophets — directly parallel to Jeremiah's word becoming fire.

Revelation 11:5 describes the two witnesses with fire from their mouths — a direct NT echo of Jeremiah's devouring fire.

2 Samuel 22:9 describes devouring fire from God's mouth, a direct image parallel to God making Jeremiah's words a fire that consumes.

Zechariah 1:6 notes that God's words through prophets 'overtook' the fathers — showing the certain fulfillment of Jeremiah's fire.