Hadith.5576 - Muhammad ibn Isa narrated from Abu Ali ibn Rashid, who said: I asked Abu Al-Hasan عليه السلام, peace be upon him, and said: "May I be your ransom, I purchased a piece of land next to mine for one thousand dirhams. When I gathered the money, I was informed that the land was an endowment (waqf)." Imam عليه السلام replied: "The purchase of endowment property is not permissible, and do not mix its yield with your wealth. Instead, give its yield to those for whom it was endowed." I said: "I do not know who its rightful beneficiaries are." Imam عليه السلام said: "Then give its yield in charity."