'Unquenchable' 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?'

If your hand causes you to sin, cut it off! It is better for you to enter into life crippled than to have two hands and go into hell, to the unquenchable fire.