The 83rd prohibition is that we are forbidden from making oil similar to the anointing oil.1
The source of this mitzvah is G‑d's statement2 (exalted be He), "Do not duplicate it with a similar formula."
The punishment for intentionally transgressing this prohibition is kares, as stated in the verse,3 "If a person blends a similar formula [or places it on an unauthorized person, he shall be cut off from his people.]" If he did so unintentionally, he must bring a sin offering.
The details of this mitzvah are explained in the first chapter of tractate Kerisus.4
