The following excerpt is taken from “Maariful Hadith” pg. 219:
It is related by Abu Hurairah (May Allah Be Pleased with him) that the Messenger of Allah (peace be upon him) said: “In Heaven there is a tree [which is so large that] if a horseman rides under its shade even for a hundred years he will not be able to pass from one side of it to the other, and the space pf any one of you in Heaven, even the length of a bow, is better than the world on which the sun rises or sets”
The object of this tradition is to produce in the hearts an earnest yearning for Paradise by stressing the superiority of celestial joys and comforts over those of the world. The first thing is about the wonderful trees in Heaven. It says that their shade is so extensive that a horseman can not cross it in a hundred years. It, then, assures that a bow-length of space in Paradise is more value than the world and all that there is in it. We have referred earlier to the Arab custom of throwing rubbish over the place by the rider where he wanted to stay as a mark of reservation. In the same way, when a person travelling on foot wanted to make a halt at some place he used to pit his bow at it. A bow-length of space in the above Tradition, thus, signifies that even the smallest place in Heaven is more precious than the entire universe.
Noomani, Maulana Manzur. (2012). Maariful Hadith – Meaning and messages of the traditions/hadith. (pg. 219). http://www.islamibayanaat.com/MaarifulHadith.htm