Romans 16:17 Now I beseech you, brethren, mark them which cause divisions and offences contrary to the doctrine which ye have learned; and avoid them.

Ephesians 5:7 Be not ye therefore partakers with them.

Ephesians 5:11 And have no fellowship with the unfruitful works of darkness, but rather reprove them.

2 Thessalonians 3:6 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.

2 Thessalonians 3:14 And if any man obey not our word by this epistle, note that man, and have no company with him, that he may be ashamed.

2 Corinthians 6:14 Be ye not unequally yoked together with unbelievers: for what fellowship hath righteousness with unrighteousness? and what communion hath light with darkness?

1 Corinthians 5:2 And ye are puffed up, and have not rather mourned, that he that hath done this deed might be taken away from among you.

1 Corinthians 5:7 Purge out therefore the old leaven, that ye may be a new lump, as ye are unleavened. For even Christ our passover is sacrificed for us:

1 Corinthians 5:13 But them that are without God judgeth. Therefore put away from among yourselves that wicked person.

Psalms 1:1 Blessed is the man that walketh not in the counsel of the ungodly, nor standeth in the way of sinners, nor sitteth in the seat of the scornful.