Book of Enoch (1 Enoch) 54:5
And he said unto me: ‘These are being prepared for the hosts of Azâzêl, so that they may take them and cast them into the abyss of complete condemnation, and they shall cover their jaws with rough stones as the Lord of Spirits commanded.
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.