The Apostle Paul
1 Corinthians 16:18ESV·traditional attribution

for they refreshed my spirit as well as yours. Give recognition to such people.

Matthew Henry Presbyterian @wholebiblehenry

In this passage the apostle gives, I. Some general advices; as, 1. That they should watch (Co1 16:13), be wakeful and upon their guard. A Christian is always in danger, and therefore should ever be on the watch; but the danger is greater at some times and under some circumstances.

Commenting on 1 Corinthians 16:13-18

John Gill Reformed Baptist @doctorgill

All the brethren greet you,.... Either the brethren, the members of the church at Ephesus; or the apostle's brethren in the ministry, that were along with him, as Sosthenes and others; or the brethren that were come to him from Corinth, namely Stephanas, Fortunatus, and Achaicus: greet ye one another with an holy kiss; See Gill on Rom 16:16.

Albert Barnes Presbyterian @notesbybarnes

Verse 18. For they have refreshed my spirit. By their presence and conversation. They have given me information respecting the state of things in the church; and their society has been with me of the most gratifying and cheering kind. And your's. "By removing," says locke, "those suspicions and fears that were on both sides." By this supplying your absence, they have benefited us both.