(Maryam) 19 : 61
جَنَّاتِ عَدْنٍ الَّتِي وَعَدَ الرَّحْمَٰنُ عِبَادَهُ بِالْغَيْبِ ۚ إِنَّهُ كَانَ وَعْدُهُ مَأْتِيًّا
Gardens of perpetual residence which the Impartial has promised His servants in unseen; indeed His Promise has to be fulfilled.
The unseen promised Gardens means the Paradise that can be seen through the Insight Adhikr by the soul. See explanation 2: 3; 6: 104 and 25: 15-16.