لَّهُمْ فِيهَا مَا يَشَاءُونَ خَالِدِينَ كَانَ عَلَى رَبِّكَ وَعْدًا مَّسْئُولًا

There they will have whatever they wish, abiding [forever]—a promise [much] besought, [binding] on your Lord.