NET
6 But we command you, brothers and sisters, in the name of our Lord Jesus Christ, to keep away from any brother who lives an undisciplined life and not according to the tradition they received from us.
Darby
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.
KJV
6 Now we command you, brethren, in the name of our Lord Jesus Christ, that ye withdraw yourselves from every brother that walketh disorderly, and not after the tradition which he received of us.