1 Chronicles 9:18-19

18who until now was assigned to the king’s gate on the east side) they were the gatekeepers for the camp of the Levites.

19Shallum the son of Kore, the son of Ebiasaph, the son of Korah, and his relatives of his father’s house, the Korahites, were in charge of the work of the service, doorkeepers of the Tent; and their fathers had been in charge of the camp of the Lord, keepers of the entrance.