Let no corrupt communication proceed out of your mouth, but that which is good to the use of edifying, that it may minister grace unto the hearers.
All Commentaries on Ephesians 4:29 Go To Ephesians 4
John Chrysostom
AD 407
What is corruption? It is what he elsewhere calls idleness: detraction, insult, facetiousness. This is how Paul trims away the roots of anger, by reducing lying, theft and even unseasonable speech. .