Book of Enoch (1 Enoch) 81:6
One year we will leave thee with thy son, till thou givest thy (last) commands, that thou mayst teach thy children and record (it) for them, and testify to all thy children; and in the second year they shall take thee from their midst.
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.