1 Chr 23:24

אֵ֣לֶּה בְנֵֽי־לֵוִי֩ לְבֵ֨ית אֲבֹתֵיהֶ֜ם רָאשֵׁ֧י הָאָב֣וֹת לִפְקוּדֵיהֶ֗ם בְּמִסְפַּ֤ר שֵׁמוֹת֙ לְגֻלְגְּלֹתָ֔ם עֹשֵׂה֙ הַמְּלָאכָ֔ה לַעֲבֹדַ֖ת בֵּ֣ית יְהוָ֑ה מִבֶּ֛ן עֶשְׂרִ֥ים שָׁנָ֖ה וָמָֽעְלָה׃

These were the descendants of Levi by their families—the heads of families, registered individually by name—those twenty years of age or older who worked in the service of the house of the LORD.