2 Chronicles 23:3-5

Darby Translation

³ And all the congregation made a covenant with the king in the house of God. And he said to them, Behold, the king's son shall reign, as Jehovah has said of the sons of David.

⁴ This is the thing which ye shall do: a third part of you that come in on the sabbath, of the priests and of the Levites, shall be keepers of the doors;

⁵ 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 Jehovah.