Exodus 30:34-36

34Then the Lord said to Moses, “Take for yourself spices--stacte, onycha, and galbanum, spices and pure frankincense; there shall be an equal part of each.

35You shall make incense from it all, a skillful mixture, the work of a perfumer, salted, pure, and holy.

36And you shall crush some of it very fine, and put part of it in front of the testimony in the tent of meeting 1where I will meet with you; it shall be most holy to you.