1 Chronicles 24:19
These were their orderings in their service to come into the house of Jehovah, according to their manner, to Aaron their father, as Jehovah, the God of Israel had commanded him.
1 Chronicles 9:25
And their brothers in their villages, were to come in for seven days from time to time with them.
1 Chronicles 24:1
And the divisions of the sons of Aaron were: The sons of Aaron: Nadab and Abihu, Eleazar, and Ithamar.
2 Chronicles 23:4
This is the thing that you shall do. A third part of you entering on the sabbath, of the priests and of the Levites, shall be keepers of the doors.
2 Chronicles 23:8
And the Levites and all Judah did according to all things that Jehoiada the priest had commanded. And every man took his men who were to come in on the sabbath, with the ones who were to go out on the sabbath. For Jehoiada the priest did not dismiss the divisions.
1 Corinthians 14:40
Let all things be done decently and in order.
Hebrews 7:11
Therefore if perfection were by the Levitical priesthood (for under it the people received the Law), what further need was there that another priest should rise after the order of Melchizedek, and not be called after the order of Aaron?