Book of Enoch (1 Enoch) 78:7
And fifteen parts of light are transferred to her till the fifteenth day (when) her light is accomplished, according to the sign of the year, and she becomes fifteen parts, and the moon grows by (the addition of) fourteenth parts.
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.