2 Chronicles 23:1-5

Now in the seventh year, Jehoiada gathered his courage, and took captains of hundreds: Azariah the son of Jeroham, Ishmael the son of Johanan, Azariah the son of Obed, Maaseiah the son of Adaiah, and Elishaphat the son of Zichri, and they entered into a covenant with him.

And they went throughout Judah and gathered the Levites from all the cities of Judah, and the heads of the fathers’ households of Israel, and they came to Jerusalem.

Then all the assembly made a covenant with the king in the house of God. And Jehoiada said to them, “Behold, the king’s son shall reign, as the Lord has spoken concerning the sons of David.

This is the thing which you shall do: a third of you, of the priests and Levites who come in on the Sabbath, shall be gatekeepers,

and a third shall be at the king’s house, and a third at the Gate of the Foundation; and all the people shall be in the courtyards of the house of the Lord.