A.T. Robertson Commentary 1 Corinthians 16:21

"The salutation of me Paul with mine own hand." — 1 Corinthians 16:21 (ASV)

Of me Paul with mine own hand (τη εμη χειρ Παυλου). Literally, "With the hand of me Paul." The genitive Παυλου is in apposition with the possessive pronoun εμη which is in the instrumental case just as in 2 Thessalonians 3:17, the sign in every Epistle. He dictated, but signed at the end. If we only had that signature on that scrap of paper.