(35) باب قَوْلِ اللَّهِ تَعَالَى {يُرِيدُونَ أَنْ يُبَدِّلُوا كَلاَمَ اللَّهِ}
Narrated Abu Huraira:
the Prophet (ﷺ) said, "Allah said, "I have prepared for My righteous slaves (such excellent things) as no eye has ever seen, nor an ear has ever heard nor a human heart can ever think of.' "
Reference: Sahih al-Bukhari 7498
In-book reference: Book 97, Hadith 123
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 9, Book 93, Hadith 589