Jerusalem Talmud Yevamot 15.6

משנה: עֵד אָמַר מֵת וְעֵד אֶחָד אָמַר לֹא מֵת אִשָּׁה אָמְרָה מֵת וְאִשָּׁה אוֹמֶרֶת לֹא מֵת הֲרֵי זוֹ לֹא תִינָּשֵׂא.

MISHNAH: One witness said that he died, another witness said that he did not die; a woman said that he died, another woman said that he did not die; she may not remarry.

הלכה: אָמְרָה מֵת בַּעֲלִי כול׳. גִּידֻל בַּר מִנְיָימִין בְּשֵׁם רַב. בְּכָל מָקוֹם שֶׁהִכְשִׁירוּ עֵדוּת הָאִשָּׁה בָאִישׁ הָאִישׁ מַכְחִישׁ אֶת הָאִשָּׁה וְהָאִשָּׁה מַכְחֶשֶׁת אֶת הָאִישׁ. נִיתְנֵי. עֵד אוֹמֵר. מֵת. וְאִשָּׁה אוֹמֶרֶת. לֹא מֵת. אִשָּׁה אוֹמֶרֶת. מֵת. וְעֵד אוֹמֵר. לֹא מֵת. תַּנֵּיי דְּבֵית רִבִּי כֵן. תַּנֵּי בְשֵׁם רִבִּי נְחֶמְיָה. הוֹלְכִין אַחַר רוֹב הָעֵדוּת. הֵיךְ עֲבִידָה. שְׁתֵּי נָשִׁים וְאִשָּׁה אַחַת עָשׂוּ אוֹתָן כִּשְׁנֵי עֵדִים וְעֵד אֶחָד. הָדָה אַתְּ אָמַר בְאִשָּׁה וְנָשִׁים. אֲבָל אִם הָיוּ מֵאָה נָשִׁים וְעֵד אֶחָד כְּעֵד אִינּוּן.

HALAKHAH: “if she says ‘my husband died’,” etc. Gidul bar Miniamin in the name of Rav: Anywhere they accepted the testimony of a woman parallel to that of a man, a man can contradict a woman and a woman can contradict a man. Then one should state: “A witness says that he died, and a woman says that he did not die; a woman said that he died and a witness said that he did not die.” In the House of Rebbi they stated it this way. It was stated in the name of Rebbi Neḥemiah: One follows the majority of the testimonies. How is that? Two women against one woman they considered as if there were two witnesses against one witness. What you say refers to a woman and women. But if there were a hundred women against one [male] witness, they are like one witness.