Book of Enoch (1 Enoch) 14:15
And I beheld a vision, And lo! there was a second house, greater than the former, and the entire portal stood open before me, and it was built of flames of fire.
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.