'Unquenchable Fire' in the Bible

Sinners are afraid in Zion; panic grips the godless. They say, 'Who among us can coexist with destructive fire? Who among us can coexist with unquenchable fire?'

Whose fan is in his hand, and he will throughly purge his floor, and gather his wheat into the garner; but he will burn up the chaff with unquenchable fire.

And if thy hand cause thee to stumble, cut it off: it is good for thee to enter into life maimed, rather than having thy two hands to go into hell, into the unquenchable fire.

And if your foot causes your downfall, cut it off. It is better for you to enter life lame than to have two feet and be thrown into hell— [the unquenchable fire,

whose fan is in his hand, thoroughly to cleanse his threshing-floor, and to gather the wheat into his garner; but the chaff he will burn up with unquenchable fire.