וַֽיְחִי־שֶׁ֗לַח אַחֲרֵי֙ הוֹלִיד֣וֹ אֶת־עֵ֔בֶר שָׁלֹ֣שׁ שָׁנִ֔ים וְאַרְבַּ֥ע מֵא֖וֹת שָׁנָ֑ה וַיּ֥וֹלֶד בָּנִ֖ים וּבָנֽוֹת׃ (ס)
And Shelah lived after he begot Eber four hundred and three years, and begot sons and daughters.
Read midrashic interpretation of Genesis 11:15: and classical rabbinic exegesis.