Reference for Yevamot 239:1

לאנסובי לצרה מקמי דידה אי אמרת צרה מעידה לחברתה אף על גב דלא אינסיב מנסבינן לה לצרה אי אמרת משום דהיא לא מקלקלא נפשה אינסיב מנסבינן לה לצרה אי לא אינסיב לא מנסבינן לה

That of allowing<span class="x" onmousemove="('comment',' Where a woman who went overseas with her husband leaving her rival in the home town returned and stated that her husband was dead. ');">¹</span> her rival to marry before herself. If it is granted that a rival may give evidence in favour of her associate, her rival may be permitted to marry even if she herself did not remarry. If, however, it be maintained that the reason is because she would not cause injury to herself, the rival would be permitted to marry only if she herself had married again, but if she herself did not remarry, her rival also would not be permitted to remarry. Now, what [is the decision]? — Come and hear: R. ELEAZAR RULED: SINCE THEY WERE ONCE PERMITTED TO THE LEVIR THEY ARE PERMITTED TO MARRY ANY MAN. Now, if it be granted that [the reason is because] she would not cause injury to herself one can well see the reason why only when the one married again is the other permitted to remarry. If it be maintained, however, that the reason is because a rival is eligible to tender evidence in favour of her associate, [the associate should be permitted to marry again] even if the rival did not remarry. Consequently it must be concluded<span class="x" onmousemove="('comment',' Lit., 'but infer from it'. ');">²</span> that R. Eleazar's reason is: Because she<span class="x" onmousemove="('comment',' The woman who reported the death of her husband. ');">³</span>

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