Reference for Kiddushin 152:6
אימא מומא ממש אמר רב אחא בר יעקב אמר קרא (במדבר יא, טז) והתיצבו שם עמך עמך בדומים לך
Perhaps a literal blemish [is meant]? - Said R'Aha B'Jacob: Scripture saith, that they may stand there with thee:<span class="x" onmousemove="('comment',' Num. XI, 16: this refers to the seventy elders, who, together with Moses, were traditionally regarded as the first great Sanhedrin of seventy one.');"><sup>13</sup></span> 'with thee' [implies,] like unto thee.<span class="x" onmousemove="('comment',' Of pure descent.');"><sup>14</sup></span> Yet perhaps that was on account of the Shechinah?<span class="x" onmousemove="('comment',' The Divine Presence. For these were endowed with the power of prophecy (v. 25) ; yet subsequent Sanhedrins may not require unstained birth?');"><sup>15</sup></span> But<span class="x" onmousemove="('comment',' So the reading in Sanh. 36b, and as required here.');"><sup>16</sup></span>