TT #18 · Parshas Shemini · Aliyah 1 · Passuk 1
Chabad.org — Vayikra Chapter 9 with Rashi
Beitzah 20a.
E-Daf.com — Beitzah 20a (Tsurras Hadaf)
English: “And he did it according to the rule.” This means according to the rule for a voluntary burnt offering, teaching that an obligatory burnt offering requires semikhah.
Analogy — the wording of the passuk is used to derive the stated teaching.
The phrase “according to the rule” connects this obligatory burnt offering to the procedures of a voluntary burnt offering, including semikhah.