فالأداء: عبارة عن تسليم عين الواجب إلى مستحقه
Adāʾ means delivering the very object of the obligation to the one entitled to it.
ʿAyn al-wājib is the very act or item initially due. A prayer obligation is fulfilled by prayer; a duty to restore a particular owned object is, in principle, fulfilled by returning that object.
The entitled party may be considered in worship as the party whose command is fulfilled, or in property matters as the rightful owner. Proper delivery of the required act or object is the route to discharge.