Verse 17

أَنزَلَ مِنَ ٱلسَّمَآءِ مَآءً فَسَالَتْ أَوْدِيَةٌۢ بِقَدَرِهَا فَٱحْتَمَلَ ٱلسَّيْلُ زَبَدًا رَّابِيًا وَمِمَّا يُوقِدُونَ عَلَيْهِ فِى ٱلنَّارِ ٱبْتِغَآءَ حِلْيَةٍ أَوْ مَتَـٰعٍ زَبَدٌ مِّثْلُهُۥ كَذَٰلِكَ يَضْرِبُ ٱللَّهُ ٱلْحَقَّ وَٱلْبَـٰطِلَ فَأَمَّا ٱلزَّبَدُ فَيَذْهَبُ جُفَآءً وَأَمَّا مَا يَنفَعُ ٱلنَّاسَ فَيَمْكُثُ فِى ٱلْأَرْضِ كَذَٰلِكَ يَضْرِبُ ٱللَّهُ ٱلْأَمْثَالَ

He sends water from the sky, whereby it flows in the rivers in exact measure as the flow causes rising foam. And from what they melt in the fire, they extract jewelry, as well as foam. God thus cites examples for the truth and the falsehood. As for the foam, it goes to waste, however, what benefits people lasts on the land. God thus cites examples.