Enoch appears in the Book of Genesis of the Pentateuch as the seventh of the ten pre-Flood Patriarchs.
This book was numerous in the Dead Sea Scrolls.
This book was also directly quoted by Jude (vs. 14-15).
Breakdown of the book of Enoch:
“About these also Enoch, the seventh from Adam, prophesied, saying, “Behold, the Lord came with ten thousands of his holy ones, to execute judgment on all, and to convict all the ungodly of all their works of ungodliness which they have done in an ungodly way, and of all the hard things which ungodly sinners have spoken against him.” from Enoch 1:9, as well as Jude 1:14-15