A Chain the Sources Do Not Agree On

The transmission chain behind Ibn Amir is one of the places where the sources of the discipline openly disagree with each other, and the atlas records the disagreement rather than choosing a side. One account has him reading to al-Mughira ibn Abi Shihab al-Makhzumi, who read to the caliph Uthman ibn Affan himself. Another takes his line through Abu al-Darda, a Companion who settled in Syria and taught there. Some accounts combine the two. The point is not that one of them must be wrong but that the biographical literature preserves more than one report about a man who died early, taught in a city far from the centres where the literature was later written, and left students who transmitted what they had been told.

What makes this worth saying out loud is that the chain is the whole basis of the claim. A reading is canonical because a line of named people carries it, because that line meets the standard of soundness the scholars of the discipline set, and because the reading stays inside the consonantal skeleton of the Uthmanic codices. When the reports about the line differ, that is a fact about the evidence and it belongs on the page. Writing a single tidy chain where the sources give two would be inventing an isnad, which is the one thing a reference work must never do here: the chain is the discipline's own core claim, and it is not the atlas's to smooth.