Genesis 5:13 in the King James Version
And Cainan lived after he begat Mahalaleel eight hundred and forty years, and begat sons and daughters:
Context
12 Kenan lived seventy years, then became the father of Mahalalel.
13 Kenan lived after he became the father of Mahalalel eight hundred forty years, and became the father of other sons and daughters
14 and all of the days of Kenan were nine hundred ten years, then he died.