2 Chronicles 23:3-5

King James Version

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

⁴ This is the thing that ye shall do; A third part of you entering on the sabbath, of the priests and of the Levites, shall be porters 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 the Lord.