Related for Bava Metzia 43:8
ה"נ מסתברא דאי ס"ד דלא שוויה שליח מי הויא תרומתו תרומה והא אתם (במדבר יח, ג) גם אתם אמר רחמנא לרבות שלוחכם מה אתם לדעתכם אף שלוחכם לדעתכם
— Raba explained it according to Abaye: [The owner] made him [who set apart the offering] his agent.<span class="x" onmousemove="('comment',' So that he can act for his owner at any time, and his action is always valid. ');"><sup>13</sup></span> This is conclusive indeed. For if you were to assume that he did not make him his agent, how could the offering be valid? Did not the Divine Law<span class="x" onmousemove="('comment',' Num. XVIII, 28. ');"><sup>14</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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