1 Corinthians 5:9
"I wrote unto you in an epistle not to company with fornicators:"
Cross References (ranked by relevance)
And have no fellowship with the unfruitful works of darkness, but rather reprove them.
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.
Be ye not unequally yoked together with unbelievers: for what fellowship hath righteousness with unrighteousness? and what communion hath light with darkness?
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.
And ye are puffed up, and have not rather mourned, that he that hath done this deed might be taken away from among you.
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:
Forsake the foolish, and live; and go in the way of understanding.