The Book of Enoch (also 1 Enoch ) is an ancient Jewish religious work, traditionally ascribed to Enoch, the great-grandfather of Noah. It is not part of the canon as used by Jews mainly. It is recognised in Ethiopia. It dates from 300BC. The first part of the Book of Enoch describes the fall of the Watchers, the angels who fathered the Nephilim. The remainder of the book describes Enoch's visits to heaven in the form of travels, visions and dreams, and his revelations. The book is referred to, and quoted, in Jude 1:14-15: "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 introduction to the Book of Enoch tells us that Enoch is "a just man, whose eyes were opened