Reference for Yevamot 117:1

מהו בתר נישואין אזלינן או בתר אירוסין אזלינן

what [is the law]:<span class="x" onmousemove="('comment',' May he marry her despite her advanced age? ');">¹</span> Are we guided by the marriage<span class="x" onmousemove="('comment',' When she was already of age and consequently forbidden to him. ');">²</span> or by the betrothal?<span class="x" onmousemove="('comment',' When she was still permitted. ');">³</span>

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