Allah the Exalted and Glorious, said: I have prepared for My pious servants which no eye has ever seen, and no ear has ever heard, and no human heart has ever perceived but it is testified by the Book of Allah. He then recited:" No soul knows what comfort has been concealed from them, as a reward for what they did". (xxxii. 17) (Using translation from Muslim 2824a)
النَّبِيَّ ﷺ قَالَ «قَالَ اللَّهُ تَبَارَكَ وَتَعَالَى أَعْدَدْتُ لِعِبَادِي الصَّالِحِينَ مَا لَا عَيْنٌ رَأَتْ وَلَا أُذُنٌ سَمِعَتْ وَلَا خَطَرَ عَلَى قَلْبِ بَشَرٍ وَمِصْدَاقُ ذَلِكَ فِي كِتَابِ اللَّهِ {فَلَا تَعْلَمُ نَفْسٌ مَا أُخْفِيَ لَهُمْ مِنْ قُرَّةِ أَعْيُنٍ جَزَاءً بِمَا كَانُوا يَعْمَلُونَ} »