John Gill Commentary Genesis 5:16

"And Mahalalel lived after he begat Jared eight hundred and thirty years, and begat sons and daughters:" — Genesis 5:16 (ASV)

And Mahalaleel lived, after he begat Jared, eight hundred and thirty years Seven hundred and thirty, as the above version, still making the same mistake:

and he begat sons and daughters; how many cannot be said.