Reference for Yevamot 202:12
מכדי הא סתמא והא סתמא מה לי חד סתם מה לי תרי סתם מה לי תלתא אלא אמר רב נחמן בר יצחק הואיל וסתם במקום מחלוקת
only two anonymous [teachings] are available; here,<span class="x" onmousemove="('comment',' On halizah. ');"><sup>44</sup></span> three anonymous [teachings] are available.<span class="x" onmousemove="('comment',' The Mishnah cited last, which adds one anonymous teaching to the single one of mi'un, also adds one to the two anonymous teachings concerning halizah. ');"><sup>45</sup></span> Consider! The one<span class="x" onmousemove="('comment',' Concerning mi'un. ');"><sup>43</sup></span> is an anonymous [teaching], and the other<span class="x" onmousemove="('comment',' On halizah. ');"><sup>44</sup></span> is an anonymous [teaching]; what difference does it make to me whether the anonymous [teachings] are one, two or three? — Rather, said R. Nahman b. Isaac, [the reason<span class="x" onmousemove="('comment',' Why the halachah is in agreement with the anonymous teaching in respect of halizah and not with that in respect of mi'un. ');"><sup>46</sup></span>