2 Thessalonians 2:15

So then, brothers, stand firm, and hold the traditions which you were taught by us, whether by word, or by letter.

1 Corinthians 11:2

Now I praise you, brothers, that you remember me in all things, and hold firm the traditions, even as I delivered them to you.

1 Corinthians 16:13

Watch! Stand firm in the faith! Be courageous! Be strong!

2 Thessalonians 2:2

not to be quickly shaken in your mind, nor yet be troubled, either by spirit, or by word, or by letter as from us, saying that the day of Christ had come.

2 Thessalonians 3:6

Now we command you, brothers, in the name of our Lord Jesus Christ, that you withdraw yourselves from every brother who walks in rebellion, and not after the tradition which they received from us.

Romans 16:17

Now I beg you, brothers, look out for those who are causing the divisions and occasions of stumbling, contrary to the doctrine which you learned, and turn away from them.

1 Corinthians 15:58

Therefore, my beloved brothers, be steadfast, immovable, always abounding in the Lord's work, because you know that your labor is not in vain in the Lord.

Philippians 4:1

Therefore, my brothers, beloved and longed for, my joy and crown, so stand firm in the Lord, my beloved.

2 Thessalonians 3:14

If any man doesn't obey our word in this letter, note that man, that you have no company with him, to the end that he may be ashamed.

Jude 1:3

Beloved, while I was very eager to write to you about our common salvation, I was constrained to write to you exhorting you to contend earnestly for the faith which was once for all delivered to the saints.

Treasury of Scripture Knowledge

Summary

Therefore, brethren, stand fast, and hold the traditions which ye have been taught, whether by word, or our epistle.

Bible References

Whether

2 Thessalonians 2:2
not to be quickly shaken in your mind, nor yet be troubled, either by spirit, or by word, or by letter as from us, saying that the day of Christ had come.
2 Thessalonians 3:14
If any man doesn't obey our word in this letter, note that man, that you have no company with him, to the end that he may be ashamed.