Talmud for Moed Katan 27:11
ממדינת הים: מתניתין דלא כר' יהודה דתניא ר' יהודה אומר הבא ממדינת הים לא יגלח מפני שיצא שלא ברשות
For it is taught: R'Judah says, One arriving [home] from abroad may not crop himself [during the festival week] because he had set out [on his voyage] without the approval [of the Rabbis].<span class="x" onmousemove="('comment',' Quoted in J.M.K. I, 1: 'For R. Judah said it is forbidden to set out on a voyage on the great sea'. The reason for his disapproval is probably on account of the risk of not arriving home in time for the festival. Cf. Shab. ');"><sup>14</sup></span> Said Raba: 'If he merely went on a tour all [authorities] are agreed that he is forbidden;<span class="x" onmousemove="('comment',' To attend to his personal appearance during the festival week.');"><sup>15</sup></span> if to seek his bread, all are agreed that he is allowed.<span class="x" onmousemove="('comment',' To attend to his personal appearance during the festival week.');"><sup>15</sup></span>