Reference for Bava Kamma 230:7

וכל היכא דאיכא הפסידא לכתחלה לא יאמר והתניא הרי שהיו לו עשר חביות של טבל טמא וראה אחת מהן שנשברה או שנתגלתה אומר הרי היא תרומת מעשר על תשע חברותיה ובשמן לא יעשה כן מפני הפסד כהן

even directly? — We suppose he would be able to rescue it with [some] exertion. But still even where there is likely to be a loss,<span class="x" onmousemove="('comment',' [I.e., where he is able to rescue with some exertion.] ');">¹⁷</span> why should he not be allowed to say so<span class="x" onmousemove="('comment',' That the produce should be redeemed by the coins. ');">¹⁶</span> even directly?<span class="x" onmousemove="('comment',' Some authorities, however, read thus: 'But still even where there is a definite loss why should his statement be of no legal validity?' V. Tosaf. a.l. but also Rashi and BaH. ');">¹⁸</span>

Jastrow