Reference for Bava Batra 261:8
ואפי' לר' מאיר דאמר אדם מקנה דבר שלא בא לעולם הני מילי לדבר שישנו בעולם אבל לדבר שאינו בעולם לא
[Now], if it is assumed [that] we learnt, "they shall take", why may they not seize sold property?<span class="x" onmousemove="('comment',' Which was really mortgaged to them prior to the sale. The right to the gift was acquired at once, i.e., on the date of the marriage contract. ');"><sup>20</sup></span> Consequently it must be inferred that we learnt: "they shall inherit"'.<span class="x" onmousemove="('comment',' Since an inheritance takes effect after the testator's death, the buyers of the property, purchase of which took place in the owner's lifetime, have the prior claim. R. Nathan's objection was, therefore, well founded. ');"><sup>21</sup></span> [Now], who has been heard to hold this view?<span class="x" onmousemove="('comment',' Enunciated in the cited Mishnah. ');"><sup>22</sup></span>