Exodus 30:35-37

35You shall make of these an incense, a compound according to the art of the perfumer, salted, pure, and holy.

36And you shall beat some of it very fine, and put some of it before the Testimony in the tabernacle of meeting where I will meet with you. It shall be most holy to you.

37But as for the incense which you shall make, you shall not make any for yourselves, according to its composition. It shall be to you holy for the Lord.