Sura al-Sajdah 32:17

فَلَا تَعْلَمُ نَفْسٌ مَّآ أُخْفِىَ لَهُم مِّن قُرَّةِ أَعْيُنٍ جَزَآءًۢ بِمَا كَانُوا۟ يَعْمَلُونَ

fa-lā taʿlamu nafsun mā ukhfiya lahum min qurrati aʿyunin jazāʾan bi-mā kānū yaʿmalūna

Now no person knows what delights of the eye are kept hidden (in reserve) for them - as a reward for their (good) deeds.