Exodus 30:7-10

7Aaron is to burn sweet incense on it morning by morning; when he attends to the lamps he is to burn incense.

8When Aaron sets up the lamps around sundown he is to burn incense on it; it is to be a regular incense offering before the Lord throughout your generations.

9You must not offer strange incense on it, nor burnt offering, nor meal offering, and you must not pour out a drink offering on it.

10Aaron is to make atonement on its horns once in the year with some of the blood of the sin offering for atonement; once in the year he is to make atonement on it throughout your generations. It is most holy to the Lord.”