וַֽיְחִ֣י אֱנ֗וֹשׁ אַֽחֲרֵי֙ הוֹלִיד֣וֹ אֶת־קֵינָ֔ן חֲמֵ֤שׁ עֶשְׂרֵה֙ שָׁנָ֔ה וּשְׁמֹנֶ֥ה מֵא֖וֹת שָׁנָ֑ה וַיּ֥וֹלֶד בָּנִ֖ים וּבָנֽוֹת׃
And Enosh lived after he begot Kenan eight hundred and fifteen years, and begot sons and daughters.
Read midrashic interpretation of Genesis 5:10: and classical rabbinic exegesis.