Verses with the word brimstone in the Old Testament (7 verses):

Genesis 19:24
Then the LORD rained upon Sodom and upon Gomorrah brimstone and fire from the LORD out of heaven;

Deuteronomy 29:23
And that the whole land thereof is brimstone, and salt, and burning, that it is not sown, nor beareth, nor any grass groweth therein, like the overthrow of Sodom, and Gomorrah, Admah, and Zeboim, which the LORD overthrew in his anger, and in his wrath:

Job 18:15
It shall dwell in his tabernacle, because it is none of his: brimstone shall be scattered upon his habitation.

Psalms 11:6
Upon the wicked he shall rain snares, fire and brimstone, and an horrible tempest: this shall be the portion of their cup.

Isaiah 30:33
For Tophet is ordained of old; yea, for the king it is prepared; he hath made it deep and large: the pile thereof is fire and much wood; the breath of the LORD, like a stream of brimstone, doth kindle it.

Isaiah 34:9
And the streams thereof shall be turned into pitch, and the dust thereof into brimstone, and the land thereof shall become burning pitch.

Ezekiel 38:22
And I will plead against him with pestilence and with blood; and I will rain upon him, and upon his bands, and upon the many people that are with him, an overflowing rain, and great hailstones, fire, and brimstone.