2 Tesalonika 3:14

3:14 But if anyone does not obey our message through this letter, take note of him and do not associate closely with him, so that he may be ashamed.

Roma 16:17

16:17 Now I urge you, brothers and sisters, ¹  to watch out for those who create dissensions and obstacles contrary to the teaching that you learned. Avoid them!

[16:17]  ¹ tn Grk “brothers.” See note on the phrase “brothers and sisters” in 1:13.