Divrey Hayamim Bais 23:2-4

Orthodox Jewish Bible

² And they went about in Yehudah, and gathered the Levi’im out of all the towns of Yehudah, and the Rashei HaAvot of Yisroel, and they came to Yerushalayim.

³ And Kol HaKahal made a brit with HaMelech in the Beis Elohim. And he (i.e., Kohen Gadol Yehoyada) said unto them, Hinei, the Ben HaMelech shall reign, just as Hashem hath said of the Bnei Dovid.

⁴ This is the thing that ye shall do: A third part of you coming on duty on Shabbos, of the Kohanim and of the Levi’im, shall keep watch at the doors;