Sal Banee Israaa'eela kam aatainaahum min aayatim baiyinah; wa mai yubaddil ni'matal laahi mim ba'di maa jaaa'athu fa innallaaha shadeedul'iqaab
Ask the children of Israel how many a clear sign We have shown to them: (also ask them) what a severe chastisement Allah inflicts on the community that, after receiving Allah's favour exchanges it (for wretchdness).