Genesis 5:27 Midrash

וַיִּהְיוּ֙ כָּל־יְמֵ֣י מְתוּשֶׁ֔לַח תֵּ֤שַׁע וְשִׁשִּׁים֙ שָׁנָ֔ה וּתְשַׁ֥ע מֵא֖וֹת שָׁנָ֑ה וַיָּמֹֽת׃ (פ)

And all the days of Methuselah were nine hundred sixty and nine years; and he died.

Read midrashic interpretation of Genesis 5:27: and classical rabbinic exegesis.