29אַל יִקְשֶׁה בְּעֵינֶיךָ שֶׁהִתִּירוּ חֲכָמִים הָעֶרְוָה הַחֲמוּרָה בְּעֵדוּת אִשָּׁה אוֹ עֶבֶד אוֹ שִׁפְחָה אוֹ עַכּוּ״ם הַמֵּסִיחַ לְפִי תֻּמּוֹ וְעֵד מִפִּי עֵד וּמִפִּי הַכְּתָב וּבְלֹא דְּרִישָׁה וַחֲקִירָה כְּמוֹ שֶׁבֵּאַרְנוּ. שֶׁלֹּא הִקְפִּידָה תּוֹרָה עַל הֲעָדַת שְׁנֵי עֵדִים וּשְׁאָר מִשְׁפְּטֵי הָעֵדוּת אֶלָּא בְּדָבָר שֶׁאֵין אַתָּה יָכוֹל לַעֲמֹד עַל בֻּרְיוֹ אֶלָּא מִפִּי הָעֵדִים וּבְעֵדוּתָן כְּגוֹן שֶׁהֵעִידוּ שֶׁזֶּה הָרַג אֶת זֶה אוֹ הִלְוָה אֶת זֶה. אֲבָל דָּבָר שֶׁאֶפְשָׁר לַעֲמֹד עַל בֻּרְיוֹ שֶׁלֹּא מִפִּי הָעֵד הַזֶּה וְאֵין הָעֵד יָכוֹל לְהִשָּׁמֵט אִם אֵין הַדָּבָר אֱמֶת. כְּגוֹן זֶה שֶׁהֵעִיד שֶׁמֵּת פְּלוֹנִי. לֹא הִקְפִּידָה תּוֹרָה עָלָיו. שֶׁדָּבָר רָחוֹק הוּא שֶׁיָּעִיד בּוֹ הָעֵד בְּשֶׁקֶר. לְפִיכָךְ הֵקֵלּוּ חֲכָמִים בְּדָבָר זֶה וְהֶאֱמִינוּ בּוֹ עֵד אֶחָד מִפִּי שִׁפְחָה וּמִן הַכְּתָב וּבְלֹא דְּרִישָׁה וַחֲקִירָה כְּדֵי שֶׁלֹּא תִּשָּׁאַרְנָה בְּנוֹת יִשְׂרָאֵל עֲגוּנוֹת: סְלִיקוּ לְהוּ הִלְכוֹת גֵּרוּשִׁין בְּסִיַּעְתָּא דִּשְׁמַיָּא
Do not wonder at the fact that our Sages discharged the prohibition [against a married woman], which is considered a very severe matter, on the basis of the testimony of a woman, a servant or a maidservant, statements made by a gentile in the course of conversation, a written statement or [testimony] that was not investigated by the ordinary process of interrogation, as we have explained. [These leniencies were instituted] because the Torah requires only testimony of two witnesses, and all the other details of the laws of witnesses with regard to matters that cannot be verified definitively except via witnesses and their testimony - e.g., that one person killed another, or that one person lent money to another. When, by contrast, the matter may be verified definitively without the testimony of a witness, and the witness cannot justify [his statements] if they are not true - e.g, when one testifies that a person died, the Torah did not necessitate [that the requirements of formal testimony be met in these instances]. For it is unlikely that a witness will testify falsely. For this reason, our Sages [extended] the leniency with regard to this matter and accepted the testimony of a single witness that is based on the testimony of a maidservant, [testimony] from a written document, and [testimony] that was not investigated by the ordinary process of interrogation. [These leniencies were accepted] so that the daughters of Israel will not be forced to remain unmarried. Blessed be the Merciful One, who grants assistance.