32.السَّجْدَة

فَلَا تَعۡلَمُ نَفۡسٌ مَّاۤ اُخۡفِىَ لَهُمۡ مِّنۡ قُرَّةِ اَعۡيُنٍ‌ۚ جَزَآءًۢ بِمَا كَانُوۡا يَعۡمَلُوۡنَ‏

So no one knows what coolness of eyes is kept hidden for them. This will be a reward for those (pious deeds) which they used to do.