1 Chronicles 6:49

But Aaron and his sons offered upon the altar of the burnt offering, that was their first duty, to offer the sacrifices, and on the altar of incense, which was burned at the regular morning and evening hour of worship, and were appointed for all of the work of the place most holy, and to make an atonement for Israel, the offering on the great Day of Atonement being entirely in the hands of the high priest, according to all that Moses, the servant of God, had commanded. Cf Numbers 18:1; 1 Chronicles 28:13; Leviticus 16:32.