Is it permissible for the questioner's mother to eat from the leftover food of a private sanatorium, which is distributed among the workers without consulting the owner, knowing that the owner is aware of this and does not object?

A Muslim must seek what is lawful in his food, drink, and clothing, as the Prophet, peace and blessings be upon him, said: "No body nourished by unlawful means shall enter Paradise." If the food is distributed to workers without the knowledge or consent of its owners, then it is unlawful and impermissible, as the Prophet, peace and blessings be upon him, said: "The wealth of a Muslim person is not lawful except with his willing consent." In this case, one must avoid it and advise his family. However, if the owners have discarded the food due to fear of spoilage or expiration, then it is permissible for whoever takes it.