Allah's Messenger (ﷺ) said, "In Paradise there is a tree so big that in its shade a rider may travel for one hundred years without being able to cross it."
Sahih al-Bukhari Book 81, Hadith 141
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Sahih al-Bukhari Book 81, Hadith 140 Next Hadith → 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.

Sahih al-Bukhari Book 81, Hadith 142