2:12. But we ought to give thanks to God always for you, brethren, beloved of God, for that God hath chosen you firstfruits unto salvation, in sanctification of the spirit and faith of the truth:
2:13. Whereunto also he hath called you by our gospel, unto the purchasing of the glory of our Lord Jesus Christ.
2:14. Therefore, brethren, stand fast: and hold the traditions, which you have learned, whether by word or by our epistle.
Traditions... See here that the unwritten traditions are no less to be received than their epistles.
2:15. Now our Lord Jesus Christ himself, and God and our Father, who hath loved us and hath given us everlasting consolation and good hope in grace,
2:16. Exhort your hearts and confirm you in every good work and word.
2 Thessalonians Chapter 3
He begs their prayers and warns them against idleness.
3:1. For the rest, brethren, pray for us that the word of God may run and may be glorified, even as among you:
May run... That is, may spread itself, and have free course.