וַֽיְחִי־יֶ֗רֶד אַֽחֲרֵי֙ הוֹלִיד֣וֹ אֶת־חֲנ֔וֹךְ שְׁמֹנֶ֥ה מֵא֖וֹת שָׁנָ֑ה וַיּ֥וֹלֶד בָּנִ֖ים וּבָנֽוֹת׃
And Jared lived after he begot Enoch eight hundred years, and begot sons and daughters.
Read midrashic interpretation of Genesis 5:19: and classical rabbinic exegesis.