זוהר ויקרא — דף לג ע”ב

One who reaches Tiferet, represented by the letter ו, understands Torah and fears sin; if he fulfills the king's commandments he inherits Malchut, represented by ה. He then merits the divine name יהו״ה, the Shem HaMeforash, associated with Adam and the letters י׳ ה׳ ו׳ ה׳. He masters his body, thoughts, and words tied to the world's vanities, which stem from the nefesh habehamit (animal soul).<br />
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The text then describes the symbolic service of Torah: bread belongs to the right, wine to the left, and the water libation along with the Written and Oral Torah to the central pillar, which unites both sides. Holy flesh and sacrifices are mentioned, as are love and unity in the Shema, sustained day and night. The companions are called to sustain this fervor, linked to the perpetual fire of the altar.<br />
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Finally, several reasons are given for the death of Aaron's sons: incense was offered only at fixed times — in the morning when the lamps were tended and between the two evenings when they were lit — except in times of mortality, as in the Moses and Aaron episode cited in Numbers 17. Aaron's sons are also said to have hastened the hour during their father's lifetime, were unmarried, and were drunk. Incense, associated with oil, gladdens beings above and below, according to Proverbs 27.