The Epistle of Saint Jude gives the following mention of a prophecy that the patriarch Enoch gave in ages long past concerning the return of the Lord. Here it is for your view.
"And Enoch also, the seventh from Adam, prophesied of these, saying, Behold, the Lord cometh with ten thousands of his saints, To execute judgment upon all, and to convince all that are ungodly among them of all their ungodly deeds which they have ungodly committed, and of all their hard speeches which ungodly sinners have spoken against him." - The Epistle of Jude 14-15.
Now this is a very interesting passage because it does not occure in the Book of Genesis where the story of Enoch is found, rather it seems to be a direct quotation from an apocryphal book known as 1 Enoch. Here is the supposed passage from that tome for your consideration.
"And behold! He cometh with ten thousands of His holy ones
To execute judgement upon all,
And to destroy all the ungodly:
And to convict all flesh
Of all the works of their ungodliness which they have ungodly committed,
And of all the hard things which ungodly sinners have spoken against Him." - 1 Enoch 1:9
Now, the thing is this, why would the Holy Spirit move Jude to quote a passage from an apocryphal book such as 1 Enoch?