2 Thessalonians 3:14-18 (ESV)
14 If anyone does not obey what we say in this letter, take note of that person, and have nothing to do with him, that he may be ashamed. 15 Do not regard him as an enemy, but warn him as a brother.
16 Now may the Lord of peace himself give you peace at all times in every way. The Lord be with you all.
17 I, Paul, write this greeting with my own hand. This is the sign of genuineness in every letter of mine; it is the way I write. 18 The grace of our Lord Jesus Christ be with you all.