[They will be] abiding therein as long as the heavens and the earth endure, except what your Lord should will. Indeed, your Lord is an effecter of what He intends.
The Saheeh International Quran Translation
خَٰلِدِينَ فِيهَا مَا دَامَتِ ٱلسَّمَٰوَٰتُ وَٱلْأَرْضُ إِلَّا مَا شَآءَ رَبُّكَ إِنَّ رَبَّكَ فَعَّالٌ لِّمَا يُرِيدُ[They will be] abiding therein as long as the heavens and the earth endure, except what your Lord should will. Indeed, your Lord is an effecter of what He intends.