Reference for Bava Batra 96:4

והלכתא בכולהו דהוו זביניה זביני ואפילו בשדה זו דהא אשה כשדה זו דמיא ואמר אמימר תליוה וקדיש קדושיו קדושין

has laid down that if a woman consents to betroth herself under pressure of physical violence, the betrothal is valid. Mar son of R. Ashi, however, said: In the case of the woman the betrothal is certainly not valid; he treated the woman cavalierly<span class="x" onmousemove="('comment',' Lit., 'not as it beseems'. ');">⁷</span> and therefore the Rabbis treat him cavalierly and nullify his betrothal. Rabina said to R. Ashi: We can understand the Rabbis doing this if he betrothed her with money,<span class="x" onmousemove="('comment',' Betrothal could be effected in three ways — by a money gift, by written deed, and by actual intercourse (Kid. ad init.). ');">⁸</span>

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