1 Chronicles 9:18-19

18And they have been hitherto in the king's gate eastward: they were the doorkeepers in the camps of the children of Levi.

19And Shallum the son of Kore, the son of Ebiasaph, the son of Korah, and his brethren, of the house of his father, the Korahites, were over the work of the service, keepers of the thresholds of the tent, and their fathers, set over the camp of Jehovah, were keepers of the entrance.