1 Chronicles 24:19
This is the order of them in their offices, to come into the house of the LORD according to their manner under Aaron their father, as the LORD God of Israel commanded.
1 Chronicles 9:25
And their brethren that were in the country came in their weeks as their course came about with them.
1 Chronicles 24:1
The division of the sons of Aaron: Nadab, Abihu, Eleazar and Ithamar.
2 Chronicles 23:4
This it is therefore that ye shall do. The third part of you priests and Levites which come in the Sabbath day, shall keep the doors;
2 Chronicles 23:8
And the Levites and all Judah did in all things as Jehoiada the priest commanded, and took every man his men: both them that came in and them that went out the Sabbath day: for Jehoiada the priest did let none of the companies depart.
1 Corinthians 14:40
And let all things be done honestly and in order.
Hebrews 7:11
If now therefore perfection came by the priesthood of the Levites - for under that priesthood the people received the law - what needed it furthermore that another priest should rise, after the order of Melchizedek, and not after the order of Aaron?