Yea, brother, let me have joy of you in the Lord: refresh my heart in the Lord.
All Commentaries on Philemon 1:20 Go To Philemon 1
Augustine of Hippo
AD 430
But when you have joy of a man in God, it is God rather than man that you enjoy. For you enjoy Him by whom you are made happy, and you rejoice to have come to Him in whose presence you place your hope of joy. And accordingly, Paul says to Philemon, “Yea, brother, let me have joy of thee in the Lord.” For if he had not added “in the Lord,” but had only said, “Let me have joy of thee,” he would have implied that he fixed his hope of happiness upon him, although even in the immediate context to “enjoy” is used in the sense of to “use with delight.” (On Christian Doctrine 1.33)