«خبر الواحد: هو ما يرويه الواحد أو الاثنان فصاعداً، كأكثر الأحاديث، ولا عبرة للعدد إذا لم تبلغ حد الشهرة»
An ahad report may be narrated by one, two, or more people without reaching the threshold of mashhur transmission.
Thus khabar al-wahid does not mean there must be exactly one narrator. Several transmitters can report something while it remains in the ahad category within the source’s classification.
The term “one” is a technical label, not simply a mathematical count. The manner and degree of its circulation matter.