14 Enoch. Just as he may have quoted from a pseudepigraphical book when he referred to Michael and Moses, so Jude here quotes from another pseudepigraphical book of the Inter-Testamental period, the book of the ancient patriarch Enoch. This prophecy does, indeed, appear very early in The Book of Enoch, and Jude’s use of it authenticates the historicity of the prophecy, even though the book itself is not divinely inspired and mostly non-historical.
14 Adam. It is noteworthy that Jude, in his one-chapter epistle, referred not only to Enoch and Adam, but also to Moses, Cain, Balaam and Korah, as well as to the sin of the angels and the destruction of Sodom. Modern apostate theologians would deny the real existence of most or all of these ancient people and events, but Jude by inspiration of God confirmed them all as real, and as providing instruction for us today.
14 saying. It is remarkable that Enoch was prophesying at least five thousand years ago of the second coming of Christ and great judgment against sinners.