1 Chronicles 24:19
So they were put into their different groups, to take their places in the house of the Lord, in agreement with the rules made by Aaron their father, as the Lord, the God of Israel, had given him orders.
1 Chronicles 9:25
And their brothers, in the country places where they were living, were to come in every seven days to be with them from time to time.
1 Chronicles 24:1
Now the divisions into which the sons of Aaron were grouped were these: the sons of Aaron, Nadab and Abihu, Eleazar and Ithamar.
2 Chronicles 23:4
This is what you are to do: let a third of you, of the priests and Levites, who come in on the Sabbath, keep the doors
2 Chronicles 23:8
So the Levites and all Judah did as Jehoiada the priest had given them orders: every one took with him his men, those who were to come in and those who were to go out on the Sabbath; for Jehoiada had not sent away the divisions.
1 Corinthians 14:40
Let all things be done in the right and ordered way.
Hebrews 7:11
Now if it was possible for things to be made complete through the priests of the house of Levi (for the law was given to the people in connection with them), what need was there for another priest who was of the order of Melchizedek and not of the order of Aaron?