Reference for Pesachim 16:17
ושמואל אמר עליונה ושלפנים הימנה מאי טעמא דייק עליונות והא חיצונה קתני למעוטי גוייאתא דגוייאתא רבי חייא תני כוותיה דרב וכולהו תנאי תנו כוותיה דשמואל והלכתא כוותיה דשמואל:
Rab said: [That means] the upper row and the one beneath it;<span class="x" onmousemove="('comment',' In the outermost row facing the door.');"><sup>18</sup></span> while Samuel said: [That means] the upper row and the one on the inside of it. What is Rab's reason? - Because he emphasizes: OUTER'But it [also] teaches: UPPERMOST? - That is to exclude those beneath the lower one.<span class="x" onmousemove="('comment',' I.e., all rows from the third from the top and downwards.');"><sup>19</sup></span> While Samuel says: 'The upper row and the one on the inside of it.' What is the reason? Because he emphasizes: UPPERMOST. But it [also] states: OUTER? - That is to exclude the inside of the inner.<span class="x" onmousemove="('comment',' Those within the second row of the top layer.');"><sup>20</sup></span> R'Hiyya taught in accordance with Rab, while all tannaim recited as Samuel. And the law is as Samuel.<span class="x" onmousemove="('comment',' From the fact that all post-Talmudic authorities accept Rab's view, however, it would appear that this passage was absent from their texts; [v. Tosaf. Yom Tob on our Mishnah and MS.M. R. Hananel, however, has this passage and accepts Samuel's ruling.]');"><sup>21</sup></span>