And We split them into separate aggregates forming communities among the populations of the various countries of the world; Among them are those who are virtuous, who instruct men in the way of righteous living, and others who are contrary in nature, in character and in tendency, who flourish on wickedness. We have tried them with interchange of favours and efficacious grace and with disfavors, misfortunes and disgrace that they may hopefully be dutiful to Allah.