Reference for Zevachim 26:8

אלא מאי אית לך למימר מרבויא דקראי קאתיא [ה"ג מרבויא דקרא קאתי]

Then as the dipping of the finger does not render a peace-offering piggul,<span class="x" onmousemove="('comment',' Since there is no dipping of the finger in the case of a peace-offering, the blood being dashed on the altar direct from the utensil. Since it is not a statutory service, it cannot render the sacrifice piggul even if it is done.');">¹⁰</span> so in the case of a sin-offering too, the dipping of the finger does not render piggul.

Jastrow