Genesis 5:13 KJV
And Cainan lived after he begat Mahalaleel eight hundred and forty years, and begat sons and daughters:
Genesis 5:13, King James Version
In context
12 And Cainan lived seventy years, and begat Mahalaleel:
13 And Cainan lived after he begat Mahalaleel eight hundred and forty years, and begat sons and daughters:
14 And all the days of Cainan were nine hundred and ten years: and he died.