Chabad.org — English translation + Rashi
Torah Temimah points to Zevachim 93b.
E-Daf.com — Zevachim 93b
HebrewBooks / Shas PDF
English: “In the blood” — in the blood that is in the vessel, and not in the blood that is on his finger.
Dip from the vessel — each tevilah must be into the blood that remains in the vessel, not residual blood on the finger.
Each tevilah must be into the blood that remains in the vessel, not residual blood on the finger. The phrase “in the blood” is understood to require immersion in the main body of blood held in the kli. Relying on blood already clinging to the finger from a prior dip does not satisfy the requirement for subsequent applications.