23 The grace of our Lord Jesus Christ be with you.
[AD 407] John Chrysostom on 1 Corinthians 16:23
"The grace of our Lord Jesus Christ be with you."

This is like a teacher, to help not only with advice, but also with prayers.

[AD 458] Theodoret of Cyrus on 1 Corinthians 16:23
It was Paul’s usual custom to pray that the grace of Christ would be with those to whom he is writing.