Word by Word Analysis

فَلَا تَعْلَمُ نَفْسٌ مَّآ أُخْفِىَ لَهُم مِّن قُرَّةِ أَعْيُنٍ جَزَآءًۢ بِمَا كَانُوا۟ يَعْمَلُونَ 17

And no soul knows what has been hidden for them of comfort for eyes [i.e., satisfaction] as reward for what they used to do.