Kitāb al-Ghayba (al-Nuʿmānī), no. 336

(32) Ahmad bin Muhammad bin Sa’eed narrated from Ali bin al-Hasan at-Taymali from his father from Muhammad bin Khalid from Tha’lba bin Maymoon that Abdurrahman bin Maslama al-Jareeri had said: “I said to Abu Abdullah as-Sadiq (as): “Some people blame us and say that how the truthful call is distinguished from the false one when they both occur.” He said: “With what do you answer them?” I said: “With nothing.” He said: “Say to them: He, who has believed in them before they occur, will know which of them is true and which is false. Allah has said, ‘Is He then Who guides to the truth more worthy to be followed, or he who himself does not go aright unless he is guided? What then is the matter with you; how do you judge?’”