Revelation 21:27

And there shall in no wise enter into it any thing that defileth, neither whatsoever worketh abomination, or maketh a lie: but they which are written in the Lamb's book of life.

Anything that defileth, [koinoun]. 'Aleph (') A B read [ koinon (G2839)], 'anything unclean.'

In the Lamb's book of life - (note, Revelation 20:12; Revelation 20:15.) As the filth of old Jerusalem was carried outside the walls and burnt, so nothing defiled shall enter the heavenly city, but be burnt outside (cf. Revelation 22:15). The apostle of love, who shows us the glories of the heavenly city, is he also who speaks plainly of the terrors of hell.