A.T. Robertson Commentary 1 Corinthians 16:18

"For they refreshed my spirit and yours: acknowledge ye therefore them that are such." — 1 Corinthians 16:18 (ASV)

For they refreshed my spirit and yours (ανεπαυσαν γαρ το εμον πνευμα κα το υμων). They did both. The very verb used by Jesus in Mt 11:28 for the refreshment offered by him to those who come to him, fellowship with Jesus, and here fellowship with each other.