Reference for Bava Batra 266:1
ההוא דאמר ליה לחבריה נכסי לך ואחריך לפלוני וראשון ראוי ליורשו הוה שכיב ראשון אתא שני קא תבע
Once a certain man said to his friend, 'My estate [shall be] yours and after you [it shall pass over] to X'. The first [was one] entitled to be his heir.<span class="x" onmousemove="('comment',' The testator's. ');"><sup>1</sup></span> [When] the first died, the second came to claim [the estate]. R. 'Ilish proposed in the presence of Raba to give his decision<span class="x" onmousemove="('comment',' Lit., 'to say'. ');"><sup>2</sup></span> that the second also is entitled to receive the bequest.<span class="x" onmousemove="('comment',' Since the rights over the estate were given to the first during his lifetime only, they cease with his death. ');"><sup>3</sup></span>