فَلا تَعلَمُ نَفسٌ ما أُخفِيَ لَهُم مِن قُرَّةِ أَعيُنٍ جَزاءً بِما كانوا يَعمَلونَ

And no soul knows what has been hidden for them of comfort for eyes as reward for what they used to do.