Book of Enoch (1 Enoch) 107:2
And now, my son, go and make known to thy son Lamech that this son, which has been born, is in truth his son, and that (this) is no lie.’
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.