YLT(i)
21 Zechariah son of Meshelemiah is gatekeeper at the opening of the tent of meeting.
22 All of those who are chosen for gatekeepers at the thresholds are two hundred and twelve; they are in their villages, by their genealogy; they whom David and Samuel the seer appointed in their office.
23 And they and their sons are over the gates of the house of Jehovah, even of the house of the tent, by watches.