וַאֲחֵיהֶ֗ם לְכֹל֙ מִשְׁפְּח֣וֹת יִשָׂשכָ֔ר גִּבּוֹרֵ֖י חֲיָלִ֑ים שְׁמוֹנִ֤ים וְשִׁבְעָה֙ אֶ֔לֶף הִתְיַחְשָׂ֖ם לַכֹּֽל׃ (פ)
And their brethren among all the families of Issachar, mighty men of valour, reckoned in all by genealogy, were fourscore and seven thousand.
Read midrashic interpretation of I Chronicles 7:5: and classical rabbinic exegesis.