Reference for Bava Metzia 100:8

אמר רבא הלכתא פחות משתות נקנה מקח יותר על שתות בטול מקח שתות קנה ומחזיר אונאה וזה וזה בכדי שיראה לתגר או לקרובו

What is the ruling? — Come and hear: THEY REVERTED TO THE RULING OF THE SAGES. Now, if you say that annulment of the sale, on the view of the Rabbis, is only within the time necessary to shew [the purchase] to a dealer or a relative, whereas on R. Tarfon's view it is all day, it is well: on that account they reverted [etc.]<span class="x" onmousemove="('comment',' For their disadvantage in that the defrauded party had a longer time within which to retract outweighed their advantage that fraud of exactly one-sixth was not recoverable, as stated above. ');">⁸</span>

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