Book of Enoch (1 Enoch) 72:13
And it returns to the east and enters into the sixth portal, and rises and sets in the sixth portal one-and-thirty mornings on account of its sign.
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.