Reference for Yevamot 216:16
אמר רב יצחק בר אשיאן ומודה רב שמותרת לאחיו של זה שנאסרה עליו
he has been permitted<span class="x" onmousemove="('comment',' In the case of a minor who has exercised the right of mi'un. ');"><sup>36</sup></span> how much more so<span class="x" onmousemove="('comment',' Should one be permitted to marry her. ');"><sup>37</sup></span> in one [involving only the penalty of] a negative commandment.<span class="x" onmousemove="('comment',' That of again marrying one's divorced wife. Thus it has been shewn that the author of the first statement in our Mishnah was Rab and that the author of the second statement was R. Ishmael son of R. Jose. Rab, though he belonged to the first generation of Amoraim, was also among the last of the Tannaim. Hence he was sometimes described as Tanna. ');"><sup>38</sup></span>