Reference for Yevamot 144:12
אמר רב יוסף האי תנא תנא דבי רבי עקיבא הוא דמרבי ליה לערל כטמא דתניא ר"ע אומר (ויקרא כב, ד) איש איש לרבות הערל
his sanctification is invalid, because he [has the status of the person whose uncircumcision is a matter of] doubt, and such a person is forbidden to perform sanctification.<span class="x" onmousemove="('comment',' Of the water of purification by mixing the water with the ashes of the red heifer. V. Num. XIX. 27. ');"><sup>37</sup></span> If an hermaphrodite.<span class="x" onmousemove="('comment',' Who had been duly circumcised. ');"><sup>38</sup></span> however, performed sanctification,<span class="x" onmousemove="('comment',' Of the water of purification by mixing the water with the ashes of the red heifer. V. Num. XIX. 27. ');"><sup>37</sup></span> his sanctification is valid. R. Judah said: Even if an hermaphrodite performed sanctification his act has no validity. because [his sex might] possibly be that of a woman, and a woman is ineligible to perform sanctification.<span class="x" onmousemove="('comment',' Tosef. Parah IV. ');"><sup>39</sup></span>