The Prophet ﷺ said, "There is a tree in Paradise (which is so big and huge that) if a rider travels in its shade for one hundred years, he would not be able to cross it." (Using translation from Bukhārī 3251)
قَالَ رَسُولُ اللهِ إِنَّ فِي الْجَنَّةِ شَجَرَةً يَسِيرُ الرَّاكِبُ فِي ظِلِّهَا مِائَةَ عَامٍ لَا يَقْطَعُهَا