Reference for Bava Batra 305:2
ההוא דקנו מיניה אתא לקמיה דרב הונא אמר מאי איעבד לך דלא אקנית כדמקנו אינשי
There was a certain [man]<span class="x" onmousemove="('comment',' Who, while on his death-bed, had presented his estate to a stranger. ');"><sup>3</sup></span> from whom [symbolic] acquisition was taken, who came before R. Huna.<span class="x" onmousemove="('comment',' Desiring, on recovery, the return of his estate. ');"><sup>4</sup></span> [The latter] said, 'What can I do for you [in such a case] where you did not transfer possession as [other] people do?'<span class="x" onmousemove="('comment',' Lit., cause to acquire'. Had he presented his estate without allowing symbolic acquisition to take place be could retract on recovery. After symbolic acquisition one has no right to withdraw. ');"><sup>5</sup></span>