1 Chronicles 24:19
This was the ordering of them in their service, to come into the house of Jehovah according to the ordinance given unto them by Aaron their father, as Jehovah, the God of Israel, had commanded him.
1 Chronicles 9:25
And their brethren, in their villages, were to come in every seven days from time to time to be with them:
1 Chronicles 24:1
And the courses of the sons of Aaron were these . The sons of Aaron: Nadab and Abihu, Eleazar and Ithamar.
2 Chronicles 23:4
This is the thing that ye shall do: a third part of you, that come in on the sabbath, of the priests and of the Levites, shall be porters of the thresholds;
2 Chronicles 23:8
So the Levites and all Judah did according to all that Jehoiada the priest commanded: and they took every man his men, those that were to come in on the sabbath; with those that were to go out on the sabbath; for Jehoiada the priest dismissed not the courses.
1 Corinthians 14:40
But let all things be done decently and in order.
Hebrews 7:11
Now if there was perfection through the Levitical priesthood (for under it hath the people received the law), what further need was there that another priest should arise after the order of Melchizedek, and not be reckoned after the order of Aaron?