Reference for Chullin 186:7

הני ביעי חשילתא שריין ואת לא תיכול משום (משלי א, ח) ואל תטוש תורת אמך

that is not yet thirty days old, are permitted without having to peel off the membrane; thereafter, if they contain semen they are forbidden,<span class="x" onmousemove="('comment',' If the membrane has not been removed because of the blood it contains.');">³</span>

Jastrow

Jastrow

Jastrow