Surely, those who disbelieve after their believing, then increase in unbelief, their repentance shall not be accepted, and these are they that go astray.

Have you not seen those who assert that they believe in what has been revealed to you and what was revealed before you? They desire to summon one another to the judgment of the Shaitan, though they were commanded to deny him, and the Shaitan desires to lead them astray into a remote error.

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