Book of Enoch (1 Enoch) 83:7
And I recounted to him the whole vision which I had seen, and he said unto me: ‘A terrible thing hast thou seen, my son, and of grave moment is thy dream-vision as to the secrets of all the sin of the earth: it must sink into the abyss and be destroyed with a great destruction.
Background and history of Book of Enoch (1 Enoch), and issues with this book.
R. H. Charles, The Book of Enoch (London: SPCK, 1917), public domain. The verse text is the English Wikisource transcription of that translation. Charles’s editorial signs are kept. He rearranges some verses in chapters 5, 39, 90, 91, and 106, so those chapters are not a straight 1, 2, 3 sequence.