Al-Tirmidhi

The Jami of al-Tirmidhi is arranged by legal chapter like the other collections and does something none of them does consistently. After most reports he adds a note: which companions transmitted something similar, which jurists in which cities acted on it, whether the schools divided over it, and what he himself thinks of the chain. The book therefore reads as a compilation with a commentary already attached, and a reader gets not only the report but its standing and its use.

He is credited with putting the grade hasan, good, into general circulation as a term of art. Before it, criticism worked mostly with a strong contrast between sound and weak, which left a large body of material that jurists relied on with no honest label. A middle term made it possible to say that a report is not of the highest grade, is nonetheless supported, and may be acted on, which is closer to how the law was actually being reasoned. The closing section of the book, on the defects of chains, sets out his criteria directly, so the working method is recoverable rather than inferred.

He had studied with al-Bukhari and cites him by name when reporting a judgement on a chain, which gives the book a second use as a record of what the most exacting critic of the preceding generation had said about particular reports. Some of those opinions survive nowhere else. A collection that preserves its teacher verdicts alongside its own is doing the work of an archive as well as of a reference, and that is one reason this book has stayed in use for eleven centuries.

The grading vocabulary is worth understanding because it is often misread from outside. Sound, good and weak describe the chain of transmission, not the content: whether the transmitters were reliable, whether they can be shown to have met, whether the chain is unbroken back to a companion. A weak report is not a report judged false; it is one whose transmission cannot be established to the required standard, and jurists differ on what may be done with such material, with some allowing it for moral encouragement and not for law. Al-Tirmidhi notes on which school used which report make his collection a source for the history of that disagreement as well as a repository.

His other well known work belongs to a different genre altogether. The Shama'il gathers reports about the Prophet appearance, dress, manner of walking, eating, sleeping and laughing, and it is read devotionally rather than legally. Books of that kind sustain a whole tradition of emulation in daily habit, and the fact that the same compiler produced both a lawyer reference and a portrait for imitation is a useful reminder that hadith literature was never a single kind of writing.

There is a limit worth stating. Criticism based on the chain can establish that a report was transmitted carefully and cannot establish that the event happened, and the tradition is aware of this: the machinery was built to control transmission at a moment when reports were multiplying, not to settle history in the modern sense. Academic study of hadith asks a different question with different methods, and reads the same collections as evidence about the communities that assembled them.