(51) باب صِفَةِ الْجَنَّةِ وَالنَّارِ
Narrated Abu Sa'id:
The Prophet (ﷺ) said: There is a tree in Paradise (so huge) that a fast (or a trained) rider may travel: for one hundred years without being able to cross it.
Reference: Sahih al-Bukhari 6553
In-book reference: Book 81, Hadith 142
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 8, Book 76, Hadith 559