Jerusalem Talmud Yevamot 13:9

משנה: פִּיקַּחַת וְחֵרֶשֶׁת בִּיאַת הַפִּיקַּחַת פּוֹטֶרֶת אֶת הַחֵרֶשֶׁת וְאֵין בִּיאַת הַחֵרֶשֶׁת פּוֹטֶרֶת אֶת הַפִּיקַּחַת. MISHNAH: A hearing wife and a deaf-mute: The intercourse of the hearing woman frees the deaf-mute but the intercourse of the deaf-mute does not free the hearing woman¹⁰⁹If a man married to a hearing woman and a deaf-mute dies childless, the execution of biblical levirate by intercourse with the hearing widow frees the deaf-mute but the execution of rabbinic levirate by intercourse with the deaf-mute does not free the hearing widow..

הלכה: פִּיקַּחַת וְחֵרֶשֶׁת כול׳. פִּיקַּחַת וְחֵרֶשֶׁת. בִּיאַת הַפִּיקַּחַת פּוֹטֶרֶת אֶת הַחֵרֶשֶׁת. אֵין בִּיאַת הַחֵרֶשֶׁת פּוֹטֶרֶת אֵת הַפִּיקַּחַת אֶלָּא פוֹסֶלֶת אֶת הַפִּיקַחַת. HALAKHAH: “A hearing wife and a deaf-mute,” etc.: A hearing wife and a deaf-mute. The intercourse of the hearing woman frees the deaf-mute. The intercourse of the deaf-mute does not free the hearing woman but disables the hearing woman¹¹⁰She now is forbidden to the levir. But since the marriage of the deaf-mute was rabbinic only, the hearing woman cannot remarry without ḥalîṣah..