An endower must be of the age of legal responsibility (bāligh), sane (ʿāqil), have an intention to make the endowment, and make it of his own volition (ikhtiyār). He must also legally (sharʿan) have disposal over his own property. Therefore, if a person who is foolish with finances (safīh) – i.e. someone who spends his wealth in futile ways – endows something, it is not valid because he does not have right of disposal over his own property.