Exodus 30:35-39

And thou shalt make it a perfume, a confection after the art of the apothecary, tempered together, pure and holy:

And thou shalt beat some of it very small, and put of it before the testimony in the tabernacle of the congregation, where I will meet with thee: it shall be unto you most holy.

And as for the perfume which thou shalt make, ye shall not make to yourselves according to the composition thereof: it shall be unto thee holy for the LORD.

Whosoever shall make like unto that, to smell thereto, shall even be cut off from his people.