2 Thessalonians 2:15

Well then, brothers, stand firm and hold to the rules which you have learned from us orally or by letter.

1 Corinthians 11:2

I commend you for always bearing me in mind and for maintaining the traditions I passed on to you.

1 Corinthians 16:13

Watch, stand firm in the faith, play the man, be strong!

2 Thessalonians 2:2

not to let your minds get easily unsettled or excited by any spirit of prophecy or any declaration or any letter purporting to come from me, to the effect that the Day of the Lord is already here.

2 Thessalonians 3:6

Brothers, we charge you in the name of the Lord Jesus Christ to shun any brother who is loafing, instead of following the rule you got from us.

Romans 16:17

Brothers, I beg of you to keep your eye on those who stir up dissensions and put hindrances in your way, contrary to the doctrine which you have been taught. Avoid them.

1 Corinthians 15:58

Well then, my beloved brothers, hold your ground, immovable; abound in work for the Lord at all times, for you may be sure that in the Lord your labour is never thrown away.

Philippians 4:1

So then, my brothers, for whom I cherish love and longing, my joy and crown, this is how you must stand firm in the Lord, O my beloved.

2 Thessalonians 3:14

Only, if anyone will not obey our orders in this letter, mark that man, do not associate with him ??that will make him feel ashamed!

Jude 1:3

Beloved, my whole concern was to write to you on the subject of our common salvation, but I am forced to write you an appeal to defend the faith which has once for all been committed 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 let your minds get easily unsettled or excited by any spirit of prophecy or any declaration or any letter purporting to come from me, to the effect that the Day of the Lord is already here.
2 Thessalonians 3:14
Only, if anyone will not obey our orders in this letter, mark that man, do not associate with him ??that will make him feel ashamed!