And the innards and the legs he shall wash with water; and the kohen shall bring all of it and smoke it on the altar: it is an olah, a fire-offering, a pleasing aroma to Hashem.
Source
Sifra, Vayikra Dibbura deNedavah, Chapter 7 on “olah hu.”
English: “It is an olah” — even if it was not flayed; even if it was not cut into pieces. Or might one say even if it was not slaughtered in the north? Scripture says “it.” Why validate without flaying and cutting, and invalidate without north? After Scripture includes, it excludes. Why validate without flaying and cutting? Because they come after the blood’s conciliation. And why invalidate without north? Because north precedes conciliation. “An olah” — even if he did not perform semichah.
In Sifra: Missing post-blood steps (flay, cut) do not strip the status “olah.” Missing the pre-blood north slaughter does. Semichah is also not indispensable for the name “olah.”
Type of Learning
Custom (include-then-exclude; before vs after ritzui).
What Is Learned
An olah remains valid without flaying, cutting, or semichah; it is invalid if the north slaughter was omitted.