Commentary for I Chronicles 9:22

כֻּלָּ֤ם הַבְּרוּרִים֙ לְשֹׁעֲרִ֣ים בַּסִּפִּ֔ים מָאתַ֖יִם וּשְׁנֵ֣ים עָשָׂ֑ר הֵ֤מָּה בְחַצְרֵיהֶם֙ הִתְיַחְשָׂ֔ם הֵ֣מָּה יִסַּ֥ד דָּוִ֛יד וּשְׁמוּאֵ֥ל הָרֹאֶ֖ה בֶּאֱמוּנָתָֽם׃

All these that were chosen to be porters in the gates were two hundred and twelve. These were reckoned by genealogy in their villages, whom David and Samuel the seer did ordain in their set office.

Rashi on I Chronicles