2 Chronicles 8:12-14
12 On the altar of the Lord that he had built in front of the portico, Solomon sacrificed burnt offerings to the Lord,
13 according to the daily requirement for offerings commanded by Moses for Sabbaths, New Moons and the three annual feasts—the Feast of Unleavened Bread, the Feast of Weeks and the Feast of Tabernacles.
14 In keeping with the ordinance of his father David, he appointed the divisions of the priests for their duties, and the Levites to lead the praise and to assist the priests according to each day’s requirement. He also appointed the gatekeepers by divisions for the various gates, because this was what David the man of God had ordered.