'Thresholds' in the Bible

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

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.