1 Chronicles 9:19-22

19Shallum son of Kore, son of Ebiasaph, son of Korah, and his kinsmen from his ancesteral clan, the Korahites, were assigned to guard the gates of the Tent. Their ancestors had been responsible for guarding the entrance to the dwelling of Adonai

20when Phinehas, son of Eleazar had been ruler over them in time past and Adonai was with him.

21Zechariah the son of Meshelemiah was gatekeeper of the door of the Tent of Meeting.

22All these chosen to be gatekeepers at the gates were 212. These were registered in the genealogical records of their villages. David and Samuel the seer had appointed them to their offices.