Reference for Bava Batra 305:4
רב אמר הרי היא כמתנת שכיב מרע מדכתיב בה במות אחר מיתה קאמר ליה והאי דכתיב בחיים סימן בעלמא דחיי
Rab said: Behold it is [to be treated] like the [usual] gift of a dying man;<span class="x" onmousemove="('comment',' Possession of which by the donee is not acquired until after the death of the testator who, if he recovers, may withdraw the gift. ');"><sup>9</sup></span> and Samuel said: Behold it is [to be treated] like the gift of a man in good health.<span class="x" onmousemove="('comment',' Possession of which is acquired immediately, and no withdrawal is possible even if the gift consisted of the testator's entire estate. ');"><sup>10</sup></span> Rab said, 'Behold, it is like the gift of a dying man — since it contains the entry. 'in death', [the testator] meant [thereby] the donee [to acquire possession] after death, while the insertion,<span class="x" onmousemove="('comment',' Lit., 'and that that he wrote'. ');"><sup>11</sup></span>