Therefore, my beloved brethren, be steadfast, unmovable, always abounding in the work of the Lord, since you know that your labor is not in vain in the Lord.
Now we command you, brethren, in the name of our Lord Jesus Christ, that you withdraw yourselves from every brother that walks disorderly, and not after the tradition which he received from us.
Beloved, when I gave all diligence to write unto you of the common salvation, it was necessary for me to write unto you, and exhort you that you should earnestly contend for the faith which was once delivered unto the saints.