Exodus 30:36-38

and you shall beat some of it very small, and put some of it before the testimony in the Tent of Meeting, where I will meet with you. It shall be to you most holy.

The incense which you shall make, according to its composition you shall not make for yourselves: it shall be to you holy for the LORD.

Whoever shall make any like that, to smell of it, he shall be cut off from his people.”