(Zumar) 39 : 20
لَٰكِنِ الَّذِينَ اتَّقَوْا رَبَّهُمْ لَهُمْ غُرَفٌ مِنْ فَوْقِهَا غُرَفٌ مَبْنِيَّةٌ تَجْرِي مِنْ تَحْتِهَا الْأَنْهَارُ ۖ وَعْدَ اللَّهِ ۖ لَا يُخْلِفُ اللَّهُ الْمِيعَادَ
But those who are heedful to their Lord, they have mansions built one above the other, beneath which rivers are flowing, the Promise of Allah, Allah will never breach His Promise.
See explanation 3: 194,198; 25: 75-76, and 36: 55-58.