والمجاز مرسل إن كانت العلاقة المصححة غير المشابهة، وإلا فاستعارة
A figure is mursal if the validating relation is other than resemblance; otherwise it is metaphor.
The term al-ʿalāqah al-muṣaḥḥiḥah means a connection sufficient to make the transfer intelligible. A random association or a word used with no rational basis does not satisfy the definition.
Hands are involved in giving; therefore “hands” can denote a person's acts of beneficence. The favors are not literally shaped like hands. The transfer depends on their causal association. In contrast, using “lion” for a brave human is based on similarity in courage.