قُلۡ هُوَ ٱلرَّحۡمَٰنُ ءَامَنَّا بِهِۦ وَعَلَيۡهِ تَوَكَّلۡنَاۖ فَسَتَعۡلَمُونَ مَنۡ هُوَ فِي ضَلَٰلٖ مُّبِينٖ
Say: "He is (Allah) Most Gracious: We have believed in Him, and on Him have we put our trust: So, soon will ye know which (of us) it is that is in manifest error."
قُلۡ أَرَءَيۡتُمۡ إِنۡ أَصۡبَحَ مَآؤُكُمۡ غَوۡرٗا فَمَن يَأۡتِيكُم بِمَآءٖ مَّعِينِۭ
Say: "See ye?- If your stream be some morning lost (in the underground earth), who then can supply you with clear-flowing water?"