1 Chronicles 9:18-19

18who hitherto waited in the king’s gate eastward: they were the porters for the camp of the children of Levi.

19And 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 tabernacle: and their fathers had been over the camp of the LORD, keepers of the entry;