'Eternal' in the Bible

And angels who had not kept their own original state, but had abandoned their own dwelling, he keeps in eternal chains under gloomy darkness, to the judgment of the great day;

as Sodom and Gomorrha, and the cities around them, committing greedily fornication, in like manner with them, and going after other flesh, lie there as an example, undergoing the judgment of eternal fire.

keep yourselves in the love of God, awaiting the mercy of our Lord Jesus Christ unto eternal life.