Reference for Bava Batra 183:6
היכי דמי
was paid?<span class="x" onmousemove="('comment',' Lit., 'how the monies are. ');"><sup>11</sup></span> — The dispute is applicable [to the case] when the price of meat has risen and stands at [the same level as] the price of [an animal for] ploughing. If so, what difference is there [whether the animal was bought for ploughing or slaughtering]?<span class="x" onmousemove="('comment',' In either case the animal is worth the price paid for it; why, then, should Rab differ from Samuel by declaring such a deal to be invalid? ');"><sup>12</sup></span> — [There is] a difference [in respect] of the trouble.<span class="x" onmousemove="('comment',' Of killing the animal and selling it. For this reason, Rab declares the sale invalid and requires the seller to return the purchase price. ');"><sup>13</sup></span> How is this<span class="x" onmousemove="('comment',' That the seller is required to return the money he received. ');"><sup>14</sup></span> to be understood?