John Gill Commentary Genesis 5:30

"And Lamech lived after he begat Noah five hundred ninety and five years, and begat sons and daughters:" — Genesis 5:30 (ASV)

And Lamech lived, after he begot Noah, five hundred ninety
and five years
The Septuagint version is five hundred and sixty five; and the Samaritan version six hundred: and begot sons and daughters ;
of which we have no account.