Reference for Zevachim 44:14
קסברי זקני דרום טמא מת [נמי] משלח קרבנותיו
surely [it] propitiates [in the case o one unclean through a reptile, who need not be besprinkled on the third and on the seventh [days]? - The Elders of the South hold that those who make atonement [the priests] are like those for whom atonement is made [the people]: as in the case of those for whom atonement is made, if they are unclean through a corpse [the headplate] does [propitiate], but if they are unclean through a reptile [it does] not,<span class="x" onmousemove="('comment',' I.e., only when the whole or the majority of the nation is unclean through a corpse must the public sacrifice be brought.');"><sup>12</sup></span> so are those who make atonement: one unclean through a corpse is [included in the propitiatory effect of the headplate].