Book of Enoch (1 Enoch) 78:11
During all the period during which the moon is growing in her light, she is transferring it to herself when opposite to the sun during fourteen days [her light is accomplished in the heaven], and when she is illumined throughout, her light is accomplished full in the heaven.
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.