Genesis 5:26

26 And Mathusala lived after his begetting Lamech eight hundred and two years, and begot sons and daughters.

Genesis 5:26 Meaning and Commentary

Genesis 5:26

And Methuselah lived, after he begat Lamech, seven hundred
eighty and two years
The Greek version is eight hundred and two years, and so makes the sum total of his life the same; but the Samaritan version only six hundred and fifty three, and so makes his whole life but seven hundred and twenty; and thus, instead of being the oldest, he is made the youngest of the antediluvian patriarchs, excepting his father Enoch: and begat sons and daughters;
some, it is highly probable, before he beget Lamech, since then he was near two hundred years of age, as well as others after

Genesis 5:26 In-Context

24 And Enoch was well-pleasing to God, and was not found, because God translated him.
25 And Mathusala lived an hundred and sixty and seven years, and begot Lamech.
26 And Mathusala lived after his begetting Lamech eight hundred and two years, and begot sons and daughters.
27 And all the days of Mathusala which he lived, were nine hundred and sixty and nine years, and he died.
28 And Lamech lived an hundred and eighty and eight years, and begot a son.

Footnotes 1

The Brenton translation of the Septuagint is in the public domain.