But let none come into the house of the Lord, save the priests, and they that minister of the Levites; they shall go in, for they are holy: but all the people shall keep the watch of the Lord.
Because their office was to wait on the sons of Aaron for the service of the house of the Lord, in the courts, and in the chambers, and in the purifying of all holy things, and the work of the service of the house of God;
And a third part shall be at the king’s house; and a third part at the gate of the foundation: and all the people shall be in the courts of the house of the Lord.
And the Levites shall compass the king round about, every man with his weapons in his hand; and whosoever else cometh into the house, he shall be put to death: but be ye with the king when he cometh in, and when he goeth out.
