Chabad.org — English translation + Rashi
Torah Temimah points to Zevachim 53a.
E-Daf.com — Zevachim 53a
HebrewBooks / Shas PDF
English: The pouring of the remainders is indispensable.
Indispensability of residual pouring — the pouring of the remainders is an essential part of the blood service and is not dispensable.
The pouring of the remainders is an essential part of the blood service and is not dispensable. The Gemara establishes that the final act of pouring residual blood at the base is me’akev (indispensable). Omitting this step leaves the blood service of the High Priest’s chatas incomplete.