Reference for Bava Kamma 40:3
אמר רבא כמה לא חלי ולא מרגיש גברא דמריה סייעיה דאע"ג דלא דמי למתניתין קבלה מיניה האי זה נהנה וזה חסר והאי זה נהנה וזה לא חסר הוא
scarf and folded it. Then Rami b. Hama said to him: [The Mishnah is:] WHERE, HOWEVER, THE ANIMAL HAS DERIVED SOME BENEFIT [FROM THE DAMAGE DONE BY IT,] PAYMENT WILL [IN ANY CASE] BE MADE TO THE EXTENT OF THE BENEFIT. Said Raba: How much worry and anxiety is a person [such as Rami b. Hama] spared whom the Master [of all] helps! For though the problem [before us] is not at all analogous to the case dealt with in the Mishnah, R. Hisda accepted the solution suggested by Rami b. Hama. [The difference is as follows:] In the case of the Mishnah the defendant derived a benefit and the plaintiff sustained a loss, whereas in the problem before us the defendant derived a benefit but the plaintiff sustained no loss. Rami b. Hama was, however, of the opinion that generally speaking fruits left on public ground have been [more or less] abandoned by their owner [who could thus not regard the animal that consumed them there as having exclusively caused him the loss he sustained, and the analogy therefore was good].