Reference for Zevachim 30:13
אלא הכי קאמר וינזרו מקדשי בני ישראל ולא יחללו
R'SIMEON DECLARES IT VALID.<span class="x" onmousemove="('comment',' In the law concerning the last case.');"><sup>14</sup></span> <big><b>GEMARA: </b></big>How do we know [that] a zar [disqualifies the sacrifice if he receives the blood]? - Because Levi taught: [Scripture says,] Speak unto Aaron and to his sons, that they separate themselves from the holy things of the children of Israel etc.<span class="x" onmousemove="('comment',' Lev. XXII, 2. This prohibits the priest from officiating whilst unclean (see following verses) . Hence the phrase 'the children' (or, 'sons', uhbc which may be the meaning of the Heb.) apparently implies a limitation: only from the sacrifices of 'the children of Israel' must they hold aloof when they are unclean, but not from other sacrifices.');"><sup>15</sup></span>