Reference for Nedarim 60:13
וחכמים אומרים לא נתכוין זה אלא ממי שדרכו להיוולד לאפוקי מאי לאפוקי דגים ועופות
will you say that he was [already born]? but even Menasseh [Josiah's grandfather] was not yet born!<span class="x" onmousemove="('comment',' This verse was spoken in the reign of Jeroboam I. ');"><sup>10</sup></span> But nolad implies both,<span class="x" onmousemove="('comment',' Biblically. Sc. 'born' and 'to be born'. ');"><sup>11</sup></span> and in vows, we follow general usage.<span class="x" onmousemove="('comment',' Lit., 'the language of the sons of men', which applies nolad to those who are yet to be born. ');"><sup>12</sup></span> BUT THE SAGES SAY: HE MEANT ALL WHOSE NATURE IT IS TO BE BORN. Excluding what? — It excludes fish and fowl.<span class="x" onmousemove="('comment',' Which are spawned and hatched respectively. ');"><sup>13</sup></span>