In Psalm 78:31, the wrath announced in verse 21 is executed as God slays the rebellious Israelites.

Psalm 78:42 highlights Israel's forgetfulness of God's power, which led to the rebellion that provoked the fire in v21.

Numbers 11:1-3 records the exact event: God's fire consumed the complainers at Taberah, which Psalm 78:21 summarizes.

In Numbers 11:10, the same incident of God's anger at Israel's complaint about food is recorded, which Psalm 78:21 poetically summarizes.

In 1 Corinthians 10:5, Paul notes God's displeasure with the wilderness generation, echoing the wrath described in Psalm 78:21.

In Jude 1:5, the reminder that God destroyed unbelieving Israelites after saving them directly parallels the wrath in Psalm 78:21.

Deuteronomy 32:22 uses the same 'fire kindled in my anger' imagery to describe God's judgment on Israel's unfaithfulness.

In 1 Corinthians 10:11, Paul explains that these events were written as examples for us, giving purpose to the wrath in Psalm 78:21.