Here’s the passage in Jude that is said to be a quote from the book of Enoch:
Jude 14-15 ......
"It was also about these that Enoch, in the seventh generation from Adam, prophesied, saying, “See, the Lord is coming with ten thousands of his holy ones, to execute judgment on all, and to convict everyone of all the deeds of ungodliness that they have committed in such an ungodly way, and of all the harsh things that ungodly sinners have spoken against him.”
It’s pretty clear from this that the writer of the Epistle of Jude claimed to be quoting a very specific individual:
the seventh from Adam. Who is this? We find him mentioned in the early chapters of Genesis:
Ge 5:18-24 ......
"When Jared had lived one hundred sixty-two years he became the father of Enoch. Jared lived after the birth of Enoch eight hundred years, and had other sons and daughters. Thus all the days of Jared were nine hundred sixty-two years; and he died. When Enoch had lived sixty-five years, he became the father of Methuselah. Enoch walked with God after the birth of Methuselah three hundred years, and had other sons and daughters. Thus all the days of Enoch were three hundred sixty-five years.
Enoch walked with God; then he was no more, because God took him."
2 Timothy 2:15-16 ........
"Study to shew thyself approved unto God, a workman that needeth not to be ashamed, rightly dividing the word of truth.