Qatf al-Azhār

Qaṭf al-Azhār is a very rare type of hadith collection dedicated to an even rarer type of hadith—the mass-transmitted (mutawātir) hadith—in which a piece of information is corroborated by a multitude of eyewitnesses whose relative abundance precludes a conspiracy to lie; it is then transmitted continuously by similar multitudes from the original witnesses to the present.