Ali 'Imran · 3:167

167. And He did this in order to demonstrate who the hypocrites were! When they were told to fight in Allah’s path, or to defend their womenfolk and their people, they said, ‘Had we known that you were going to fight properly, then we would have followed you; but you actually throw yourselves to death!’ At that moment, they were closer to showing their disbelief than their faith, saying with their tongues what was not in their hearts. Allah knows best what they hide in their breasts, and will repay them accordingly.