Ephesians 4:29-31 (New International Version)

 ²⁹Do not let any unwholesome talk come out of your mouths, but only what is helpful for building others up according to their needs, that it may benefit those who listen. ³⁰And do not grieve the Holy Spirit of God, with whom you were sealed for the day of redemption. ³¹Get rid of all bitterness, rage and anger, brawling and slander, along with every form of malice.