Albert Barnes Commentary 1 Corinthians 16:20

"All the brethren salute you. Salute one another with a holy kiss." — 1 Corinthians 16:20 (ASV)

All the brethren, and so on. This refers to all the Christians with whom Paul was connected in Ephesus. They felt a deep interest in the church at Corinth and sent them Christian salutations.

With an holy kiss. See the note on Romans 16:16.

The word "greet" can also be rendered as "salute."