Reference for Keritot 41:40

והתנן כלל אמרו בטומאה

as we have learnt: The blood of a dead animal is clean, according to Beth Shammai; Beth Hillel say: It is unclean!<span class="x" onmousemove="('comment',' 'Ed. V, 1. The decision is in accordance with Beth Hillel, that the blood of a carcass is, like its flesh, contaminated with weighty uncleanness.');">²⁷</span>

Jastrow

Jastrow