joseph had indeed come to you before with clear proofs but you did not cease to doubt what he had brought until he died when you said god will not send a prophet after him. that is how god leads the waster the sceptic astray.
ولقد جاءكم يوسف من قبل بالبينات فما زلتم في شك مما جاءكم به حتى إذا هلك قلتم لن يبعث الله من بعده رسولا كذلك يضل الله من هو مسرف مرتاب