Reference for Yevamot 239:3
אלא אי אמרת משום דצרה מעידה לחברתה אף על גב דלא אינסיב נמי אלא שמע מינה טעמא דרבי אלעזר משום דאינסיב הוא ולא מקלקלא נפשה
— She might be acting [in the spirit of] <i>let me die with the Philistines</i>.<span class="x" onmousemove="('comment',' Judges XVI, 30. In order to inflict injury upon her associate she is willing to suffer injury herself. ');"><sup>6</sup></span> Come and hear: If a woman and her husband went to a country beyond the sea, and she returned and stated, 'My husband is dead', she may be married again and she also receives her <i>kethubah</i>. Her rival, however, is forbidden. R. Eleazar<span class="x" onmousemove="('comment',' Var. lec. R. Eliezer cf. supra p. 845, n. 16. ');"><sup>7</sup></span> ruled: Since she becomes permitted her rival also becomes permitted!<span class="x" onmousemove="('comment',' Cf. supra 118a. This proves that, on the evidence of a rival, an associate is always permitted to marry again whether the rival who gave the evidence did or did not herself marry again. ');"><sup>8</sup></span>