2 Peter 2:5

and spared not the ancient world, but preserved Noah with seven others, a preacher of righteousness, when he brought a flood upon the world of the ungodly;

Significantly, Peter here refers to the flood recorded in Genesis as an historical event, denying the allegation of some that it was a myth.

The ancient world ... In the Greek text here, Peter omitted the article; but Strachan said, "This is not a mark of illiteracy. The chapter is prophetic in form, and the omission of the article is characteristic of this style."[26]

Noah with seven others ... These were Noah, Shem, Ham, and Japheth, with their respective wives.

A preacher of righteousness ... There is not a word in Enoch about Noah's having been a preacher of righteousness;[27] nor, for that matter, even a word in the Old Testament about it. The link is not between Peter and Enoch, but between Peter and Christ. Furthermore, the implication is clear, even in the Old Testament, that Noah attempted to persuade his contemporaries to renounce their evil ways and turn to God.

[26] R. H. Strachan, op. cit., p. 135.

[27] Michael Green, op. cit., p. 99.