Exodus 30:35-37

35Make a fragrant mixture from them, a blend like the work of the perfumer, seasoned with salt, pure and holy.

36You are to beat some of it into powder, and set it before the Testimony in the Tent of Meeting, where I will meet with you. It is to be most holy to you.

37But the incense which you make, with its formula, you are not to make for yourselves. It is to be holy to you, for Adonai.