the unbelievers solemnly swear by god that if they were to be shown some miracle they would certainly believe. tell them only with god are all the miracles. even if a miracle was to take place 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