Reference for Moed Katan 27:14
אימא סיפא נראין דברי חכמים כשיצא ברשות מאי ברשות אילימא למזונות הא אמרת דברי הכל מותר ואלא להרויחא והא אמרת נראין דברי רבי יהודה בהא
Now consider the latter clause: 'And the Sages' opinion seems apposite where he had set out with approval'; what is meant by 'with approval'? If I say [approval to set out] for earning his bread, have you not said that all are agreed that he is allowed?<span class="x" onmousemove="('comment',' To attend to his personal appearance during the festival week.');"><sup>16</sup></span> Again, should it [rather] mean for profit [seeking]; but surely then, did you not say that' R'Judah's [adverse] opinion seems apposite in this case [that he is forbidden]?<span class="x" onmousemove="('comment',' All of which shows that the difference cannot be as stated on the question of a voyage for profit.');"><sup>18</sup></span>