Exodus 30:7-9, 34-38

Aaron shall burn fragrant incense on it; he shall burn it every morning when he trims the lamps. When Aaron trims the lamps at twilight, he shall burn incense. There shall be perpetual incense before the LORD throughout your generations. You shall not offer any strange incense on this altar, or burnt offering or meal offering; and you shall not pour out a drink offering on it.

Then the LORD said to Moses, “Take for yourself spices, stacte and onycha and galbanum, spices with pure frankincense; there shall be an equal part of each. With it you shall make incense, a perfume, the work of a perfumer, salted, pure, and holy. You shall beat some of it very fine, and put part of it before the testimony in the tent of meeting where I will meet with you; it shall be most holy to you. The incense which you shall make, you shall not make in the same proportions for yourselves; it shall be holy to you for the LORD. Whoever shall make any like it, to use as perfume, shall be cut off from his people.”