Related for Bava Batra 271:11
רב פפי אמר איכא אקניתא דצריך ואיכא אקניתא דלא צריך אקנייה וקנינא מיניה לא צריך קנינא מיניה ואקנייה צריך
[about] the <i>halachah</i>?' 'You inquire of him,' said [R. Huna] 'whether the <i>halachah</i> [is according to R. Jose] or not; and as to his reason I will tell you [it later].' [Thereupon, R. Nahman] inquired of [Rabbah], who replied to him, 'Thus said Rab: The <i>halachah</i> [is] in accordance with [the view of] R. Jose'. When<span class="x" onmousemove="('comment',' Lit., 'after'. ');"><sup>29</sup></span> they came out, [R. Huna] said to him.<span class="x" onmousemove="('comment',' R. Nahman. ');"><sup>30</sup></span> 'This is R. Jose's reason: He is of the opinion that the date of the deed proves its import,'<span class="x" onmousemove="('comment',' That the presentation of the gift is to begin on that day (though the expression 'from that day' was not inserted). Had it been intended to postpone the presentation till after death, there would have been no point in recording the date of the deed. ');"><sup>31</sup></span>