Book of Enoch (1 Enoch) 78:4
In the circumference of the sun there are seven portions of light which are added to it more than to the moon, and in definite measures it is transferred till the seventh portion of the sun is exhausted.
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.