Tosefta for Bava Batra 283:1
ולימא ליה דאמר לכשתלד רב הונא לטעמיה דאמר רב הונא אף לכשתלד לא קנה
But let him reply to him [that our Mishnah speaks of the case] where he said, 'After she will have born [the child'!<span class="x" onmousemove="('comment',' So that a born child, not an embryo, would acquire possession. Hence, no objection could be raised from our Mishnah against R. Huna's statement. ');"><sup>1</sup></span> — R. Huna follows his own view. For R. Huna said: [A child] does not acquire ownership<span class="x" onmousemove="('comment',' Of a sum of money that his father had assigned to him before his birth, while still an embryo. ');"><sup>2</sup></span> even [where the father had said].<span class="x" onmousemove="('comment',' That the child shall acquire possession. ');"><sup>3</sup></span> 'after she<span class="x" onmousemove="('comment',' The mother. ');"><sup>4</sup></span> will have born [him]<span class="x" onmousemove="('comment',' The child to whom the assignment was made. ');"><sup>5</sup></span>