I would like to know rewards you will get if you enter highest level Jannah aka Jannatul-Firdaws. I couldn't find much about highest level Jannah. Most people know what a lowest level person in Jannah will get but I couldn't find anything on highest level Jannah. I know prophet Musa(A.S) asked Allah about who will get highest level jannah but I think Allah said it is no eye seen, no ear heard, no heart can imagine or something like that. Please remember I am not asking who will get highest level Jannah, I am asking what kind of rewards they will get if you enter Jannatul Firdaws, please answer from Quran and hadiths.
In Ayah 17 of Surat Assajdah, we read:
فَلَا تَعْلَمُ نَفْسٌ مَّا أُخْفِيَ لَهُم مِّن قُرَّةِ أَعْيُنٍ جَزَاءً بِمَا كَانُوا يَعْمَلُونَ
Fala taAAlamu nafsun ma okhfiya lahum min qurrati aAAyunin jazaan bima kanoo yaAAmaloon
No soul knoweth what is kept hid for them of joy, as a reward for what they used to do.