2 John 1 11
for the one who gives him a greeting [who encourages him or wishes him success, unwittingly] participates in his evil deeds.
Compare with other 3 random translations
GW 2 John 1:11Whoever greets him shares the evil things he’s doing.
LSV 2 John 1:11For he who is saying to him, “Greetings,” has fellowship with his evil works.
WEB 2 John 1:11for he who welcomes him participates in his evil deeds.