Reference for Pesachim 181:3
לפיכך אם אירע בהן פסול פטורין מלעשות פסח שני חוץ מן המפקח בגל שהוא טמא מתחלתו:
EXCEPT ONE WHO WAS REMOVING DEBRIS, BECAUSE HE WAS UNCLEAN FROM THE BEGINNING.<span class="x" onmousemove="('comment',' If he finds the person underneath dead, he himself was defiled through overshadowing the dead, and thus he was unclean when the animal was sacrificed.');"><sup>5</sup></span> <big><b>GEMARA: </b></big>Rabbah son of R'Huna said in R'Johanan's name: They learned this only of a heathen prison; but [if he is incarcerated in] an Israelite prison, one slaughters for him separately; since he was promised, he will [definitely] be released, as it is written, The remnant of Israel shall not do iniquity, nor speak lies.<span class="x" onmousemove="('comment',' Zeph. III, 13.');"><sup>6</sup></span>