3 John 1:1; 3 John 1:3-4; 3 John 1:8; 3 John 1:12

1 The elder to the beloved Gaius, whom I love in truth.
3 For I was very glad when brethren came and testified to your truth, that is, how you are walking in truth. 4 I have no greater joy than this, to hear of my children walking in the truth.
8 Therefore we ought to support such men, so that we may be fellow workers with the truth.
12 Demetrius has received a good testimony from everyone, and from the truth itself; and we add our testimony, and you know that our testimony is true.