Reference for Gittin 67:13
למאי ניחוש לה אי משום אונסא אין אונס בגיטין אי משום גלויי דעתא בגיטא פלוגתא דאביי ורבא הוא
A certain man said [on writing a Get for his betrothed], If I do not marry her within thirty days, this shall be a Get. When the thirtieth day came, he said, See, I am busy making the preparations. Now why should we have any doubts [about the validity of the Get]? If because the man was forcibly prevented [from marrying], force majeure is no plea in regard to a Get. If again because he revealed his intention [of annulling it], on this point there is a difference of opinion between Abaye and Raba.<span class="x" onmousemove="('comment',' According to Abaye, the revealing of his intention makes no difference, according to Raba he reveals his intention not to annul the Get but to fulfil his condition. Both, however, agree that the Get is valid. ');"><sup>12</sup></span>