I Chronicles 1:10 Midrash

וְכ֖וּשׁ יָלַ֣ד אֶת־נִמְר֑וֹד ה֣וּא הֵחֵ֔ל לִהְי֥וֹת גִּבּ֖וֹר בָּאָֽרֶץ׃ (ס)

And Cush begot Nimrod; he began to be a mighty one in the earth.

Read midrashic interpretation of I Chronicles 1:10: and classical rabbinic exegesis.