Reference for Bava Kamma 224:14

ואי אית ליה מקרקעי למלוה כתבינן ולא היא אדרכתא אמטלטלי לא כתבינן אף על גב דאית ליה מקרקעי חיישינן שמא תכסיף

but if he resides at a distance this is not done. Again, even where he resides far away if he has relatives nearby or if there are caravans which take that route, we should have to wait another twelve months until the caravan is able to go there and come back, as Rabina waited in the case of Mar Aha twelve months until a caravan was able to go to Be-Huzae<span class="x" onmousemove="('comment',' [The modern Khuzistan, S.W. persia. Obermeyer, op. cit. p. 200 points out that the distance between Matha Mehasia (Sura) the seat of Rabina's court, and Khuzistan could be easily covered by a caravan within a three weeks' journey, and that the twelve months allowed by Rabina was probably due to some serious obstruction that impeded progress along the caravan route.] ');">²⁴</span> and come back. This, however, is no proof for in that case<span class="x" onmousemove="('comment',' Dealt with by Rabina. ');">²⁵</span>

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