'Persons' in the Bible

and if He did not spare the ancient world, but protected Noah, a preacher of righteousness, with seven others, when He brought [the judgment of] a flood upon the world of the ungodly;

Therefore, [let me warn you] beloved, knowing these things beforehand, be on your guard so that you are not carried away by the error of unprincipled men [who distort doctrine] and fall from your own steadfastness [of mind, knowledge, truth, and faith],