he sent down water from the sky so valleys flowed according to their measure therefore the water flow brought forth the froth swollen upon it and upon which they ignite the fire to make ornaments and tools from that too rises a similar froth allah illustrates that this is the example of the truth and the falsehood the froth then bursts and disappears and that which is of use to people remains in the earth this is how allah illustrates the 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