Ver. 10,11. Such as bring any contrary doctrine, (as Galatians 1:8), ought not to be harboured or countenanced by any encouraging salutation, lest we involve ourselves in the participation of their guilt, 1 Timothy 5:22.
Related Commentaries of 2 John 1:10
2 John 1:10
10 If there come any unto you, and bring not this doctrine, receive him not into your house, neither bid him God speed: