1 Chronicles 9:22-34

All these that were chosen to be porters in the thresholds were two hundred and twelve. These were reckoned by genealogy in their villages, whom David and Samuel the seer did ordain in their office of trust. So they and their children had the oversight of the gates of the house of Jehovah, even the house of the tent, by wards. On the four sides were the porters, toward the east, west, north, and south. And their brethren, in their villages, were to come in every seven days from time to time to be with them: for the four chief porters, who were Levites, were in an office of trust, and were over the chambers and over the treasuries in the house of God. And they lodged round about the house of God, because the charge thereof was upon them; and to them pertained the opening thereof morning by morning. And certain of them had charge of the vessels of service; for by count were these brought in and by count were these taken out. Some of them also were appointed over the furniture, and over all the vessels of the sanctuary, and over the fine flour, and the wine, and the oil, and the frankincense, and the spices. And some of the sons of the priests prepared the confection of the spices. And Mattithiah, one of the Levites, who was the first-born of Shallum the Korahite, had the office of trust over the things that were baked in pans. And some of their brethren, of the sons of the Kohathites, were over the showbread, to prepare it every sabbath. And these are the singers, heads of fathers’ houses of the Levites, who dwelt in the chambers and were free from other service; for they were employed in their work day and night. These were heads of fathers’ houses of the Levites, throughout their generations, chief men: these dwelt at Jerusalem.