they thought there will be no fitnah so they became blind and deaf after that allah turned to them yet again many of them became blind and deaf. and allah is the allseer of what they do.
وحسبوا ألا تكون فتنة فعموا وصموا ثم تاب الله عليهم ثم عموا وصموا كثير منهم والله بصير بما يعملون