'Brimstone' in the Bible

Yahweh rained down from heaven upon Sodom and Gomorrah brimstone and fire from Yahweh.

'All its land is brimstone and salt left by fire, {none of its land will be sown}, and it will not make plants sprout out and it will not grow any vegetation; [it is] as the destruction of Sodom and Gomorrah, Adman and Zeboiim, which Yahweh overturned in his anger and in his wrath.'