Muhammad ibn Isa Al-Ubaydi narrated that Ahmad ibn Hamzah wrote to Abu Al-Hasan, peace be upon him, regarding a mudabbar (a slave who was set to be freed upon his owner's death) who was placed in an endowment (waqf), and then his owner died while owing a debt that could not be covered by his remaining wealth. Imam عليه السلام wrote in response: "The endowment is to be sold to settle the debt."