2 Thessalonians 2:15
Stand firm then, Brothers, and hold fast to the truths that we taught you, whether by word or by letter.
1 Corinthians 11:2
I praise you, indeed, because you never forget me, and are keeping my injunctions in mind, exactly as I laid them upon you.
1 Corinthians 16:13
Be watchful; stand firm in your faith; show yourselves men; be strong.
2 Thessalonians 2:2
Not lightly to let your minds become unsettled, nor yet to be disturbed by any revelation, or by any message, or by any letter, purporting to come from us, to the effect that the Day of the Lord is come.
2 Thessalonians 3:6
We urge you, Brothers, in the name of the Lord Jesus Christ, to avoid any Brother who is living an ill-ordered life, which is not in agreement with the teaching that you received from us.
Romans 16:17
I urge you, Brothers, to be on your guard against people who, by disregarding the teaching which you received, cause divisions and create difficulties; dissociate yourselves from them.
1 Corinthians 15:58
Therefore, my dear Brothers, stand firm, unshaken, always diligent in the Lord's work, for you know that, in union with him, your toil is not in vain.
Philippians 4:1
So then, my dear Brothers, whom I am longing to see--you who are my joy and my crown, stand fast in union with the Lord, dear friends.
2 Thessalonians 3:14
If any one disregards what we have said in this letter, mark that man and avoid his company, that he may feel ashamed.
Jude 1:3
Dear friends, while I was making every effort to write to you about our common Salvation, I felt that I must write to you at once to urge you to fight in defense of the Faith that has once for all been entrusted to the keeping of Christ's People.