he sends down from the sky rain and valleys flow according to their capacity and the torrent carries a rising foam. and from that which they heat in the fire desiring adornments and utensils is a foam like it. thus allah presents truth and falsehood. as for the foam it vanishes cast off but as for that which benefits the people it remains on the earth. thus does allah present examples.
أنزل من السماء ماء فسالت أودية بقدرها فاحتمل السيل زبدا رابيا ومما يوقدون عليه في النار ابتغاء حلية أو متاع زبد مثله كذلك يضرب الله الحق والباطل فأما الزبد فيذهب جفاء وأما ما ينفع الناس فيمكث في الأرض كذلك يضرب الله الأمثال