Exodus 30:35-37

30:35 and make it into an incense, a perfume, the work of a perfumer. It is to be finely ground, and pure and sacred. 30:36 You are to beat some of it very fine and put some of it before the ark of the testimony in the tent of meeting where I will meet with you; it is to be most holy to you. 30:37 And the incense that you are to make, you must not make for yourselves using the same recipe; it is to be most holy to you, belonging to the Lord.