It is commonly believed that brimstone is sulphur which is commonly found on the brims of volcanos.
The cities of the plain were destroyed by a rain of fire and brimstone (Genesis 19:24-25). In Isaiah 34:9 allusion is made to the destruction of these cities.
This word figuratively denotes destruction or punishment (Job 18:15; Isaiah 30:33; 34:9; Psalms 11:6; Ezek. 38:22).
It is used
in connection with
excruciating torment in Rev. 14:10; 19:20; 20:10.