Reference for Pesachim 157:16
וקא מטמא לגברא דמעיקרא כי מיתעביד בטומאת הגוף דכרת קא מיתעביד
were clean, or the Israelites were clean while the priests and the service-vessels were unclean, and even if the Israelites and the priests were clean while the service-vessels were unclean, they must sacrifice in uncleanness, because a public sacrifice cannot be divided.<span class="x" onmousemove="('comment',' That some should bring it in a state of cleanness and others in a state of uncleanness. Since the majority bring it in uncleanness, even the minority who are clean bring it in uncleanness too.');"><sup>18</sup></span> R'Hisda said: They learned this only if the [slaughtering] knife became defiled through a person unclean by the dead,<span class="x" onmousemove="('comment',' This is the 'service-vessel' referred to and its degree of uncleanness.');"><sup>19</sup></span>