1 Chronicles 9:19-27

Shallum 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. Phinehas the son of Eleazar was ruler over them in times past, and the LORD was with him. Zechariah son of Meshelemiah was gatekeeper at the entrance of the Tent of Meeting. All those chosen to be gatekeepers at the thresholds were 212. They were enrolled by their genealogies in their villages [around Jerusalem], these men [whose grandfathers] David and Samuel the seer had appointed to their official duty. So they and their sons were in charge of the gates of the house of the LORD, that is, the house of the tabernacle, as guards. The gatekeepers were stationed on the four sides —on the east, west, north, and south. Their relatives in their villages were to come in every seven days from time to time to be with them; for these Levites, the four chief gatekeepers, had an official duty, and were in charge of the chambers and treasuries of the house of God. They spent the night around the house of God, for the [night] watch was theirs, and they were in charge of opening the house morning after morning.