Related for Bava Metzia 43:1
וכן ירדן שנטל מזה ונתן לזה מה שנטל נטל ומה שנתן נתן
or if the Jordan<span class="x" onmousemove="('comment',' Or any other river which carries away goods and lands them somewhere else. ');"><sup>1</sup></span> takes from one and gives to another, then what has been taken is taken, and what has been given is given.<span class="x" onmousemove="('comment',' The recipient has a right to keep the goods. Cf. B.K., 114a. ');"><sup>2</sup></span>
Tosefta Ketubot
A thief who took from this one and gave to that one—whatever he took is taken, whatever he gave is given. A robber who took from this one and gave to that one—whatever he took is taken, whatever he gave is given. If the Jordan [river] took from this one and gave to this one—whatever it took is taken, whatever it gave is given. If a river carried off trees, stones or beams from this one and gave [them] to this one—if the owner despaired [of getting this property back] then they are his [the finder's]; but if the owner is in pursuit after them, or they are in another place [and thus had no way to know that their property was carried off by the river], then they belong to the owner.
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