and they swear their strongest oaths by allah that if there came to them a sign they would surely believe therein. say signs are but with allah and what will make you perceive that if it came they will not believe
وأقسموا بالله جهد أيمانهم لئن جاءتهم آية ليؤمنن بها قل إنما الآيات عند الله وما يشعركم أنها إذا جاءت لا يؤمنون