Quoting Commentary for I Chronicles 9:19

וְשַׁלּ֣וּם בֶּן־ק֠וֹרֵא בֶּן־אֶבְיָסָ֨ף בֶּן־קֹ֜רַח וְֽאֶחָ֧יו לְבֵית־אָבִ֣יו הַקָּרְחִ֗ים עַ֚ל מְלֶ֣אכֶת הָעֲבוֹדָ֔ה שֹׁמְרֵ֥י הַסִּפִּ֖ים לָאֹ֑הֶל וַאֲבֹֽתֵיהֶם֙ עַל־מַחֲנֵ֣ה יְהוָ֔ה שֹׁמְרֵ֖י הַמָּבֽוֹא׃

And Shallum the son of Kore, the son of Ebiasaph, the son of Korah, and his brethren, of his father’s house, the Korahites, were over the work of the service, keepers of the gates of the Tent; and their fathers had been over the camp of the LORD, keepers of the entry;