2 Chronicles 23:4-6

New King James Version

⁴ This is what you shall do: One-third of you ^(A)entering on the Sabbath, of the priests and the Levites, shall be keeping watch over the doors; ⁵ one-third shall be at the king’s house; and one-third at the Gate of the Foundation. All the people shall be in the courts of the house of the Lord. ⁶ But let no one come into the house of the Lord except the priests and ^(B)those of the Levites who serve. They may go in, for they are holy; but all the people shall keep the watch of the Lord.