Exodus 30:34-36

The LORD said to Moses, “Take to yourself sweet spices, gum resin, and onycha, and galbanum; sweet spices with pure frankincense: there shall be an equal weight of each;

and you shall make incense of it, a perfume after the art of the perfumer, seasoned with salt, pure and holy:

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.