וְהַיּוֹשְׁבִים֙ הָרִ֣אשֹׁנִ֔ים אֲשֶׁ֥ר בַּאֲחֻזָּתָ֖ם בְּעָרֵיהֶ֑ם יִשְׂרָאֵל֙ הַכֹּ֣הֲנִ֔ים הַלְוִיִּ֖ם וְהַנְּתִינִֽים׃
Now the first inhabitants that dwelt in their possessions in their cities were, Israelites, the priests, the Levites, and the Nethinim.
Read midrashic interpretation of I Chronicles 9:2: and classical rabbinic exegesis.