Exodus 30:34-36

34The Lord said to Moses, “Take fragrant spices: stacte, onycha, and galbanum; the spices and pure frankincense are to be in equal measures.

35Prepare expertly blended incense from these; it is to be seasoned with salt, pure and holy.

36Grind some of it into a fine powder and put some in front of the testimony in the tent of meeting, where I will meet with you. It must be especially holy to you.