1 Chronicles 12:27

And Jehoiada was the leader of the house of Aaron; and with him were three thousand and seven hundred,

2 Kings 11:4

And in the seventh year Jehoiada sent and fetched the captains over hundreds of the Carites and of the guard, and brought them to him into the house of Jehovah; and he made a covenant with them, and took an oath of them in the house of Jehovah, and showed them the king's son.

2 Kings 11:9

And the captains over hundreds 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, and came to Jehoiada the priest.

2 Kings 25:18

And the captain of the guard took Seraiah the chief priest, and Zephaniah the second priest, and the three keepers of the threshold:

1 Chronicles 6:49-57

But Aaron and his sons offered upon the altar of burnt-offering, and upon the altar of incense, for all the work of the most holy place, and to make atonement for Israel, according to all that Moses the servant of God had commanded.

1 Chronicles 9:20

And Phinehas the son of Eleazar was ruler over them in time past, and Jehovah was with him.

1 Chronicles 27:17

of Levi, Hashabiah the son of Kemuel: of Aaron, Zadok:

Treasury of Scripture Knowledge

Summary

And Jehoiada was the leader of the Aaronites, and with him were three thousand and seven hundred;

Bible References

The leader

1 Chronicles 9:20
And Phinehas the son of Eleazar was ruler over them in time past, and Jehovah was with him.
2 Kings 11:4
And in the seventh year Jehoiada sent and fetched the captains over hundreds of the Carites and of the guard, and brought them to him into the house of Jehovah; and he made a covenant with them, and took an oath of them in the house of Jehovah, and showed them the king's son.
2 Kings 25:18
And the captain of the guard took Seraiah the chief priest, and Zephaniah the second priest, and the three keepers of the threshold:

Aaronites

1 Chronicles 6:49
But Aaron and his sons offered upon the altar of burnt-offering, and upon the altar of incense, for all the work of the most holy place, and to make atonement for Israel, according to all that Moses the servant of God had commanded.
1 Chronicles 27:17
of Levi, Hashabiah the son of Kemuel: of Aaron, Zadok:

American Standard Version Public Domain