2 John: 9 Anyone who is so "progressive" 7 as not to remain in the teaching of the Christ does not have God; whoever remains in the teaching has the Father and the Son. 10 8 If anyone comes to you and does not bring this doctrine, do not receive him in your house or even greet him; 11 for whoever greets him shares in his evil works.
What is interesting in this passage it affirms preservation of the saints..