2 Thessalonians 2:15
So then, brethren, stand firm, and hold fast the instructions which ye have been taught, whether by word or by our letter.
1 Corinthians 11:2
Now I praise you, that in all things ye are mindful of me; and that as I have directed you, ye keep the directions.
1 Corinthians 16:13
Be vigilant; stand fast in the faith; quit yourselves like men; be strong.
2 Thessalonians 2:2
that ye be not soon shaken in mind, nor troubled, neither by spirit, nor by word, nor by letter, as if it were by us, as that the day of the Lord is present.
2 Thessalonians 3:6
Now we enjoin you, brethren, in the name of our Lord Jesus Christ, that ye withdraw from every brother walking disorderly and not according to the instruction which he received from us.
Romans 16:17
But I beseech you, brethren, to consider those who create divisions and occasions of falling, contrary to the doctrine which ye have learnt, and turn away from them.
1 Corinthians 15:58
So then, my beloved brethren, be firm, immovable, abounding always in the work of the Lord, knowing that your toil is not in vain in the Lord.
Philippians 4:1
So that, my brethren, beloved and longed for, my joy and crown, thus stand fast in the Lord, beloved.
2 Thessalonians 3:14
But if any one obey not our word by the letter, mark that man, and do not keep company with him, that he may be ashamed of himself;
Jude 1:3
Beloved, using all diligence to write to you of our common salvation, I have been obliged to write to you exhorting you to contend earnestly for the faith once delivered to the saints.