Reference for Chullin 148:27

איתיביה רבי יוחנן לר"ש בן לקיש

But let it be accounted no more than the blood that oozes out; has it not been taught: With regard to the blood that oozes [out of the animal after the slaughtering] there is only a formal prohibition;<span class="x" onmousemove="('comment',' Which carries with it the penalty of a flogging only.');">¹³</span>

Jastrow