Reference for Bava Batra 284:10
אמר ליה רבי אבהו לרבי ירמיה הלכתא כוותן או הלכתא כותייכו אמר ליה פשיטא דהלכתא כוותן דקשישנא מינייכו ולאו הלכתא כוותייכו דדרדקי אתון אמר ליה מידי בקשישותא תליא מילתא בטעמא תליא מילתא וטעמא מאי זיל לגביה דרבי אבין דאסברתה ניהליה
[can] certainly acquire no ownership.<span class="x" onmousemove="('comment',' Of the estate, merely by virtue of the father's assignment. ');"><sup>25</sup></span> since they are not yet in existence; has [however]. this lad<span class="x" onmousemove="('comment',' The eldest son. ');"><sup>26</sup></span> an [additional] share beside<span class="x" onmousemove="('comment',' Lit., 'in place'. ');"><sup>27</sup></span> the [other] sons,<span class="x" onmousemove="('comment',' When, in due course they inherit the estate by the right of succession would he, in addition to what is due to him as one of the sons, receive also a share by virtue of the special assignment made to him by his father? ');"><sup>28</sup></span> or has the lad no [additional] share beside<span class="x" onmousemove="('comment',' Lit., 'in place'. ');"><sup>27</sup></span> the [other] sons? — R. Abin and R. Measha and R. Jeremiah say: The lad receives an [additional] share beside the [other] sons. R. Abbahu and R. Hanina b. Papi and R, Isaac Nappaha say: The lad receives no [additional] share beside the [other] sons. R. Abbahu said to R. Jeremiah. 'Is the law in accordance with our view<span class="x" onmousemove="('comment',' Lit., 'us'. ');"><sup>29</sup></span> or in accordance with yours?' He replied to him, 'It is obvious that the law' is in accordance with our view because we are older than you. and [that] the law' [can] not be according to your view because you are [only] juniors.' The other retorted, 'Does the matter then depend on age? [Surely] the matter depends on reason!' 'And what is the reason?' [R. Jeremiah asked.] 'Go to R. Abin,' [replied R. Abbahu.] 'to whom I have explained the matter