they swear by god with their most solemn oaths that if a miracle were to come to them they would believe in it. say the miracles are only with god. but how do you know? even if it did come they still would not believe.
وأقسموا بالله جهد أيمانهم لئن جاءتهم آية ليؤمنن بها قل إنما الآيات عند الله وما يشعركم أنها إذا جاءت لا يؤمنون