صحيح البخاري
Sahih Bukhari
كتاب الوصايا
The Book of Wasaya (Wills and Testaments)
باب إذا وقف أرضا أو بئرا واشترط لنفسه مثل دلاء المسلمين:
Chapter. If somebody keeps a piece of land or a well as an endowment, or stipulates that he should benefit by its water as the other Muslims do (will this be permissible)?