Part in it: two councils of dictation

It was stated in the introduction to the book in the words of the investigator: "This is a rare hadith fragment by the imam, the trustworthy and accomplished imam, Abu Abd al-Rahman Ahmad bin Shuaib al-Nasa'i, may God have mercy on him. I investigated its origin and worked hard to control its text. Its hadiths were produced in a moderate manner, and I relied in verifying it on the Dhahiri version....