Sunan Ibn Majah Book 16, Hadith 52
“The land around a well (that is considered to be part of it) is the length of the well rope (in all directions).”
“Whoever digs a well, is entitled to forty forearms' length surrounding it is as a resting place for his flocks.”
the Messenger of Allah (ﷺ) ruled concerning one, two or three date palms belonging to a man among other palm trees - when they differ concerning entitlement to the surrounding land. He ruled that the land around each of those trees, as far as their leaves reach, measured from the bottom of the tree, belongs to the owner of the tree.