2 Chronicles 23:6-7

6But no one is to enter the house of the Lord except the priests and 1the ministering Levites; they may enter, for they are holy. And all the people are to keep the command of the Lord. 7The Levites will surround the king, each man with his weapons in his hand; and whoever enters the house is to be put to death. Therefore be with the king when he comes in and when he goes out.”