Responsa for Yevamot 229:5

סבר רב חייא בר אבין למימר היינו עישינו עלינו בית עישינו עלינו מערה אמר רבא מי דמי התם לא קאמרה חזו גבראי חזו גבראי ועוד גברא חרוכא דשדי ופסתא דידא דשדיא

[her statement is believed] in accordance with the view of R. Idi. For R. Idi stated: A woman [carries] her weapons about her.<span class="x" onmousemove="('comment',' 'A.Z 25b; i.e., her sex is her protection against murder. When, therefore, her husband is attacked, unless there was actually a state of war, she does not flee to save her own life, but remains on the spot to the very end. Her evidence that her husband is dead may consequently be accepted as that of an eye witness. This, therefore, provides no proof that a wife is also believed if an actual state of war existed when her husband's death presumably occurred. ');">¹⁵</span> There was once a man whose bridal chamber caught fire at the close of his wedding feast, and his wife cried, 'Look at my husband, look at my husband!' When they came near they saw a charred body<span class="x" onmousemove="('comment',' Lit., 'man'. ');">¹⁶</span> that was prostrate [on the ground] and the hand [of a man]<span class="x" onmousemove="('comment',' Who apparently attempted to rescue the bridegroom. ');">¹⁷</span> lying [by it]. R. Hiyya b. Abin intended to give his decision [that the law in this case] is the same as [that where a woman stated]. 'They set our house on fire', or 'they filled the cave wherein we sheltered with smoke'. Raba, however, said: Are [the two cases at all] similar? There, she did not say. 'Look at my husband, look at my husband'!<span class="x" onmousemove="('comment',' Hence it is possible that her husband did not die at all. ');">¹⁸</span>

Maharach Or Zarua Responsa