In kinayah for the referent, what is inferred is the identity of a person, object, or organ, not merely an attribute or the attribution of one. A distinctive property, role, or location serves as the pointer.
«مَجَامِعُ الْأَضْغَانِ» indicates hearts, since the heart is conventionally associated with resentment and concealed enmity. The intended organ is not directly named but identified through a characteristic role.