فَلَا تَعۡلَمُ نَفۡسٞ مَّآ أُخۡفِيَ لَهُم مِّن قُرَّةِ أَعۡيُنٖ جَزَآءَۢ بِمَا كَانُواْ يَعۡمَلُونَ
So no self knows what I hide for them from an eyes`/sights` delight/satisfaction , a reward/reimbursement because (of) what they were making/doing
Author: Literal