The difficulty is that those who write about the Shi'as, take such unlikely authors as ibn Khaldun and Ahmad ibn 'Abdi Rabbih Andalusi as their source.
Zaidi ya hayo, zipo riwaya nyingi kutokea kwake katika vitabu vyote vya Sahih kutokea Bayan ibn Bushr, 'Ata' ibn Sa'ib na wengineo.