והגד לך ושמעת ודרשת היטב. ולהלן הוא אומר ודרשת וחקרת ושאלת היטב, "היטב" "היטב" לגזרה שוה. מלמד שבודקין אותו בז' חקירות. אין לי אלא חקירות, בדיקות מנין? תלמוד לומר והנה אמת נכון הדבר.
(Devarim 17:4) "And it be told to you, and you hear, and you search it out well": And elsewhere (Ibid. 13:15) it is written "And you shall inquire, and you shall search out, and you shall ask well," and elsewhere (Ibid. 19:18) "And the judges shall inquire well." "well" - "well," for a gezeirah shavah (identity). We are hereby taught that he is examined with seven chakiroth (cross-examinations). This tells me only of chakiroth. Whence do I derive (the same for) bedikoth (examinations)? From (13:15, 17:4) "and, behold, true and correct is the thing."