The Torah in Parashat Naso (Bamidbar 5:15) discusses the special offering brought by a Sota – a suspected adulteress who is brought to the Bet Ha’mikdash to determine whether she had indeed betrayed her husband. The woman brings a Minha (flour offering) which differs in several respects from standard Minha sacrifices. One difference is that the Torah here forbids adding Lebona (frankincense) to the Sota’s offering. Whereas other Minha offerings specifically required Lebona, the Torah forbids including this spice in the Minha brought by a Sota. The Sefer Ha’hinuch explains that Lebona has the effect of enhancing the sacrificing, by emitting a pleasing fragrance. It is thereafter inappropriate in the context of the offering brought by a Sota; given the unpleasant circumstances that necessitate her sacrifice, it should not be made beautiful and fragrant. Secondly, the Sefer Ha’hinuch adds, our saintly matriarchs – Sara, Ribka, Rachel and Leah – are compared to “Gib’at Ha’lebona” – “the hill of frankincense” (Shir Hashirim 4:6). The Sota acted inappropriately, veering far from the righteous example set by our matriarchs, and so Lebona is excluded from her offering to symbolize her having distanced herself from our tradition of modest, dignified behavior, which our matriarchs exemplified. The Sefer Ha’hinuch writes that this command is directed toward the Kohanim. A Kohen who adds frankincense to a Sota’s Minha offering has violated this command and is liable to Malkut.