and it was transmitted from Qatādah by Shuʿbah and Saʿīd, and from ʿAbd al-ʿAzīz by Ismāʿīl (1) ibn ʿUlayyah and ʿAbd al-Wārith; and from each of those narrators it was further related by a number of others (2).
The fourth category is the gharīb (solitary) report: it is a narration that a single individual transmits (3) at whatever point (4) in the chain that singleness occurs. We shall later divide it (5) into the absolutely solitary and the relatively solitary (6).
All of these—meaning the four categories just mentioned (7)—apart from the first, which is the mutawātir, are classed as āḥād, and each of them is termed a khabar wāḥid (single-chain report). Linguistically, a khabar wāḥid is any narration conveyed by one person, while in technical usage it is any report that does not meet the conditions of tawātur (8).
Within the āḥād reports there exists the maqbul (accepted), which, according to the majority, must be acted upon.