John Gill Commentary Genesis 5:25

"And Methuselah lived a hundred eighty and seven years, and begat Lamech:" — Genesis 5:25 (ASV)

And Methuselah lived a hundred and eighty and seven years, and begot Lamech. The Septuagint version is a hundred and sixty seven; the Samaritan only sixty seven; the same names were given to some of the posterity of Seth as were to those of Cain, as Lamech here, and Enoch before.