וְהֻֽגַּד־לְךָ֖ וְשָׁמָ֑עְתָּ וְדָרַשְׁתָּ֣ הֵיטֵ֔ב וְהִנֵּ֤ה אֱמֶת֙ נָכ֣וֹן הַדָּבָ֔ר נֶעֶשְׂתָ֛ה הַתּוֹעֵבָ֥ה הַזֹּ֖את בְּיִשְׂרָאֵֽל׃
and you have been informed or have learned of it, then you shall make a thorough inquiry. If it is true, the fact is established, that abhorrent thing was perpetrated in Israel,
Torah Temimah points to Sanhedrin 40a.
וְדָרַשְׁתָּ וְחָקַרְתָּ וְשָׁאַלְתָּ הֵיטֵב – מִנַּלַּן דְּעָבְדִינַן שֶׁבַע חֲקִירוֹת בְּעֵדִים, דִּכְתִיב וְדָרַשְׁתָּ וְחָקַרְתָּ וְשָׁאַלְתָּ הֵיטֵב, וּכְתִיב וְדָרַשְׁתָּ הֵיטֵב, וּכְתִיב וְדָרְשׁוּ הַשּׁוֹפְטִים הֵיטֵב.
English: “And you shall inquire and investigate and ask thoroughly” — From where do we know that we perform seven interrogations of the witnesses? From the verses “and you shall inquire and investigate and ask thoroughly,” “and you shall inquire thoroughly,” and “and the judges shall inquire thoroughly.”
Torah Temimah cross-references the detailed derashot already given on the parallel requirement of thorough investigation in the law of the ir ha-nidachat.
Derash on the verse (cross-reference to earlier sugya) — not a formal named middah of the 13. The verse is treated as a restatement of the investigative standard already established in Re’eh.
The requirement of thorough inquiry and investigation applies here exactly as it does in the law of the condemned city; the earlier exposition remains authoritative.