Book of Enoch (1 Enoch) 58:3
And the righteous shall be in the light of the sun, And the elect in the light of eternal life: The days of their life shall be unending, And the days of the holy without number.
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.