What is the charity that the Prophet (peace be upon him) forbade with his saying: "Indeed, we do not eat charity"? And is it permissible to eat from an animal that was slaughtered for the sake of Allah?

Charity is forbidden for the family of Muhammad, but not for others. The donor may eat from his charity if he has not specified anyone and if it aligns with the common practice in his country. However, if the donor specifies a person for the charity, he may not eat from it.