Book of Enoch (1 Enoch) 24:2
And I went beyond it and saw seven magnificent mountains all differing each from the other, and the stones (thereof) were magnificent and beautiful, magnificent as a whole, of glorious appearance and fair exterior: ⌈⌈three towards⌉⌉ the east, ⌈⌈one⌉⌉ founded on the other, and three towards the south, ⌈⌈one⌉⌉ upon the other, and deep rough ravines, no one of which joined with any other.
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.