Ali 'Imran 3:167 وليعلم الذين نافقوا وقيل لهم تعالوا قاتلوا في سبيل الله او ادفعوا قالوا لو نعلم قتالا لاتبعناكم هم للكفر يوميذ اقرب منهم للايمان يقولون بافواههم ما ليس في قلوبهم والله اعلم بما يكتمون ١٦٧

And that He might know the hypocrites, unto whom it was said: Come, fight in the way of Allah, or defend yourselves. They answered: If we knew aught of fighting we would follow you. On that day they were nearer disbelief than faith. They utter with their mouths a thing which is not in their hearts. Allah is Best Aware of what they hide.