Bede, on Exod 30:34

“And the Lord said to Moses: Take unto thee spices, stacte, and onycha, galbanum of sweet savour, and the clearest frankincense, all shall be of equal weight.”

“"You shall not offer upon it incense of another composition." Later in this book the spices from which this incense was to be composed are specified by name: stacte, and onycha, galbanum of pleasing fragrance, and the purest frankincense. It is obvious that all of these signify the eternal goods which we ought to seek from the Lord before anything else. Consequently upon the altar of gold they were not supposed to offer incense of any composition other than that which the Lord had decreed, because when we pray we ought to seek from the Lord nothing other than that which he himself has commanded and has promised to give us. And we ought to believe nothing concerning him other than that which he himself has taught.”

Imported from an open dataset — not yet checked against the printed edition.