Dawud b. Farqad and Harun b. Sa`d

I said to Abi Abdillah عليه السلام: I was praying the Maghrib in the mosque of the messenger of the Allah صلى الله عليه وآله وسلم [in Madina] when a man behind me said: “What is [the matter] with you [that you are] two groups concerning the hypocrites, while Allah has cast them back (to disbelief) because of what they have earned. Do you want to guide him whom Allah has made to go astray?” (4:88), I realized that he said this with me in mind, so I turned towards him and said: “and certainly the devils do inspire their allies to dispute with you, and if you obey them in doing so then you would indeed be of the polytheists” (6:121), then I recognized that it was Harun bin Sa`d, he (Dawud) said: so Abu Abdillah عليه السلام laughed when he heard this and said: you pre-empted him with the most fitting reply even before engaging in a debate with him – by the permission of Allah. I said: may I be made your ransom, truly by Allah – he did not utter a single word in reply [he was flummoxed], so Abu Abdillah عليه السلام said: no one is more ignorant than them (the Zaydiyya), among the Murjia there exist jurists and scholars, and among the Khawarij there exist jurists and scholars, but no one is more ignorant than these.