O you who believe! believe in Allah and His Messenger and the Book which He has revealed to His Messenger and the Book which He revealed before; and whoever disbelieves in Allah and His angels and His messengers and the last day, he indeed strays off into a remote error.

And certainly Yusuf came to you before with clear arguments, but you ever remained in doubt as to what he brought; until when he died, you said: Allah will never raise a messenger after him. Thus does Allah cause him to err who is extravagant, a doubter