This week’s phrase comes from Genesis 19:24-26:
Then the LORD rained down burning sulphur on Sodom and Gomorrah— from the LORD out of the heavens. Thus he overthrew those cities and the entire plain, including all those living in the cities— and also the vegetation in the land. But Lot’s wife looked back, and she became a pillar of salt.
Fire and brimstone is not so much a phrase, but more an adjective used to indicate something involves the anger and judgement of God.