Mark 9:48-49
where their worm does not die and the fire does not go out.
Hebrews 6:4-8
For it is impossible, in the case of those who have once for all been enlightened, and have tasted the sweetness of the heavenly gift, and have been made partakers of the Holy Spirit,
Hebrews 10:26-31
For if we wilfully persist in sin after having received the full knowledge of the truth, there no longer remains in reserve any other sacrifice for sins.
2 Peter 2:19-22
And they promise them freedom, although they are themselves the slaves of what is corrupt. For a man is the slave of any one by whom he has been worsted in fight.
Revelation 21:8
But as for cowards and the unfaithful, and the polluted, and murderers, fornicators, and those who practise magic or worship idols, and all liars--the portion allotted to them shall be in the Lake which burns with fire and sulphur. This is the Second Death."
Revelation 22:11
Let the dishonest man act dishonestly still; let the filthy make himself filthy still; let the righteous practise righteousness still; and let the holy be made holy still."