וּמִן־הַנְּתִינִ֗ים שֶׁנָּתַ֨ן דָּוִ֤יד וְהַשָּׂרִים֙ לַעֲבֹדַ֣ת הַלְוִיִּ֔ם נְתִינִ֖ים מָאתַ֣יִם וְעֶשְׂרִ֑ים כֻּלָּ֖ם נִקְּב֥וּ בְשֵׁמֽוֹת׃
and of the Nethinim, whom David and the princes had given for the service of the Levites, two hundred and twenty Nethinim; all of them were mentioned by name.
Read midrashic interpretation of Ezra 8:20: and classical rabbinic exegesis.