Exodus 30:35 in the World English Bible
You shall make incense of it, a perfume after the art of the perfumer, seasoned with salt, pure and holy.
Context
34 And the LORD said unto Moses, Take unto thee sweet spices, stacte, and onycha, and galbanum; these sweet spices with pure frankincense: of each shall there be a like weight:
35 And thou shalt make it a perfume, a confection after the art of the apothecary, tempered together, pure and holy:
36 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.