Menachot 86

Sugya Map: The Ontology of "Oil"

• The Issue: Does the status of shemen (oil) for Menachot depend on objective botanical extraction or subjective culinary utility?
• Primary Sources: Menachot 86a; Leviticus 24:2 (Menoarah requirements); Exodus 29:40 (Meal offering requirements).
• Nafka Mina: Whether "sap" (sharaf)—an acidic, non-fat byproduct—can legally function as "oil" for a korban.

Text Snapshot

• Gemara (86a): "But isn’t it taught in a baraita that if one did bring it, it is valid, because it is regarded merely as sap (sharaf) and not as oil?"
• Rashi (s.v. מפני שהוא מוהל שרף): "It is merely sap/exudate (mohel sharaf) in general, and not actual fat (shuman)."
• Nuance: The conflict hinges on whether the Mishna categorizes by essence (fat) or taxonomical label (oil).

Readings

• Rashi (86a): Maintains an essentialist reading. If the liquid is sharaf (sap/watery exudate), it lacks the chemical fat content required to be "oil," rendering it pasul (invalid) by definition.
• Rabbeinu Tam (Tosafot ad loc): Offers a radical chiddush—he emends the text to kasher. He argues that if the Mishna classifies these as "oils" in the list of pesulim (invalidated items), it implicitly admits they possess the halakhic status of oil, even if they are low-grade.

Friction

• Kushya: If the product is merely "sap," how can it be included in the Mishna’s list of "unfit oils"? If it isn't oil, it shouldn't be listed at all (it would be davr aher—a different substance).
• Terutz: Rav Yosef’s reconciliation—the dispute is not about the substance, but the consumer's perspective. The wealthy (R. Shimon) treat the sap as oil; the parsimonious (R. Hiyya) categorize it as waste. The halakha tracks the "wealth" of the intent.

Intertext

• Parallel: Menachot 86b regarding the "Western Lamp" (ner ma'aravi). The miracle of the light is not for God’s need, but for testimony—proving that the Presence dwells among the people. Just as the light is a symbol, the "oil" for the korban is a symbol of the giver's intent.

Psak/Practice

The Mishnah Berurah and subsequent poskim regarding mincha or ritual oils emphasize that hidur mitzvah (beautification) is not merely aesthetic—it is ontological. Using a inferior "sap" when "oil" is required misses the tzurata d'milta (the form of the matter).

Takeaway

Halakha often defines a substance not by its chemical composition, but by its functional utility in the context of the Mishkan. The "wealthy" perspective—valuing the substance as oil—is the benchmark for what we present before the Divine.