1 Chronicles 6:49

6:49 But Aaron and his descendants offered sacrifices on the altar for burnt offerings and on the altar for incense as they had been assigned to do in the most holy sanctuary. They made atonement for Israel, just as God’s servant Moses had ordered.

1 Chronicles 27:1

Leaders of the Army

27:1 What follows is a list of Israelite family leaders and commanders of units of a thousand and a hundred, as well as their officers who served the king in various matters. Each division was assigned to serve for one month during the year; each consisted of 24,000 men.