“Whoever digs a well, is entitled to forty forearms' length surrounding it is as a resting place for his flocks.”  

أَنَّ النَّبِيَّ ﷺ قَالَ مَنْ حَفَرَ بِئْرًا فَلَهُ أَرْبَعُونَ ذِرَاعًا عَطَنًا لِمَاشِيَتِهِ  

“The land around a well (that is considered to be part of it) is the length of the well rope (in all directions).”  

قَالَ رَسُولُ اللَّهِ ﷺ حَرِيمُ الْبِئْرِ مَدُّ رِشَائِهَا