Reference for Yoma 122:4
תניא כוותיה דרבי יוחנן אשם מצורע ששחטו שלא לשמו או שלא נתן מדמו לגבי בהונות הרי זה עולה לגבי מזבח וטעון נסכים וצריך אשם אחר להכשירו ורב חסדא אמר לך מאי צריך צריך ואין לו תקנה
Indeed, as it was also taught: [Concerning] a baldheaded nazirite Beth Shammai taught he requires to pass through a razor [over his head],<span class="x" onmousemove="('comment',' Num. VI, 5: All the days of his vow of the Naziriteship there shall no razor come upon his head, until the days be fulfilled, i.e., but when the days are fulfilled he shall have his hair cut.');"><sup>6</sup></span> whereas Beth Hillel said: He need not pass through a razor [over his head]. And R'Abina said: When Beth Shammai say: It is necessary, [they mean] he requires to [do so] but he has no remedy.<span class="x" onmousemove="('comment',' This bald-pate cannot do so. Yet it is stated 'he requires'.');"><sup>7</sup></span>