Chosen by God for the office of high priest, holy and glorious prophet Aaron, glorifying the Lord who has glorified you, we raise songs of praise to you, as the first bishop of the Most High, for you now stand before God and offer Him sacrifices and burnt offerings, and we cry out to you: Rejoice, Holy Prophet Aaron, high priest of the Lord and first Archbishop of the Most High God. https://orthodoxreflections.com/akathist-to-saint-aaron-the-high-priest/