Given the importance of the Sunan works — of Abu Dawud, al-Tirmidhi, al-Nasa'i and Ibn Majah — after the two Sahihs in establishing the writing of hadith in the third century AH, the author studies the conditions their compilers set, as known from their books, for the narrator and for the narration of hadith. A book of benefit to specialists, university students and those who call to Allah the Exalted. It was originally a master's thesis.
