מִן־בְּנֵי־פֶ֗רֶץ הָרֹ֛אשׁ לְכָל־שָׂרֵ֥י הַצְּבָא֖וֹת לַחֹ֥דֶשׁ הָרִאשֽׁוֹן׃
Of the children of Perez was he, and the chief of all the captains of the host for the first month.
Read midrashic interpretation of I Chronicles 27:3: and classical rabbinic exegesis.