Exodus 30:7-10

7“Aaron must burn sweet-smelling incense on this altar every morning when he takes care of the lamps.

8Also, when Aaron lights the lamps at dusk, he must burn incense. For generations to come an incense offering must burn constantly in the Lord’s presence.

9“Never burn any unauthorized incense on this altar or any burnt offerings or grain offerings. Never pour a wine offering on it.

10Once a year Aaron must make peace with the Lord by putting blood on its horns. Once a year—for generations to come—blood from the offering must be placed on the altar to make peace with the Lord. It is most holy to the Lord.”