וְהִתְיַחְשָׂ֣ם לְתֹלְדוֹתָ֗ם רָאשֵׁי֙ בֵּ֣ית אֲבוֹתָ֔ם גִּבּוֹרֵ֖י חָ֑יִל עֶשְׂרִ֥ים אֶ֖לֶף וּמָאתָֽיִם׃ (ס)
And they were reckoned by genealogy, after their generations, heads of their fathers’houses, mighty men of valour, twenty thousand and two hundred.
Read midrashic interpretation of I Chronicles 7:9: and classical rabbinic exegesis.