King James Version (KJV)
Of the children of Perez was the chief of all the captains of the host for the first month.
Modern English
He was a descendant of Perez, and was chief of all the commanders for the first month.
Hebrew
מִן בְּנֵ֣י פֶּ֔רֶץ הָרֹ֗אשׁ לְכָל שָׂרֵ֛י הַצְּבָא֖וֹת לַחֹ֥דֶשׁ הָרִאשֽׁוֹן׃
min bney pereṣ haroʾsh lkal sharey haṣbaʾvot laḥodesh hariʾshvon