1 Chronicles 9:26-33

26for the four chief gatekeepers, who were Levites, were entrusted to be over the chambers and the treasures of the house of God. 27And they lodged around the house of God, for on them lay the duty of watching, and they had charge of opening it every morning. 28Some of them had charge of the utensils of service, for they were required to count them when they were brought in and taken out. 29Others of them were appointed over the furniture and over all the holy utensils, also over the fine flour, the wine, the oil, the incense, and the spices. 30Others, of the sons of the priests, prepared the mixing of the spices, 31and Mattithiah, one of the Levites, the firstborn of Shallum the Korahite, was entrusted with making the flat cakes. 32Also some of their kinsmen of the Kohathites had charge of the showbread, to prepare it every Sabbath. 33Now these, the singers, the heads of fathers’ houses of the Levites, were in the chambers of the temple free from other service, for they were on duty day and night.