Romans 1:32
In short, though knowing full well the sentence which God pronounces against actions such as theirs, as things which deserve death, they not only practise them, but even encourage and applaud others who do them.
Romans 12:9
Let your love be perfectly sincere. Regard with horror what is evil; cling to what is right.
1 Corinthians 15:33
Do not deceive yourselves: "Evil companionships corrupt good morals."
2 Corinthians 6:14-16
Do not come into close association with unbelievers, like oxen yoked with asses. For what is there in common between righteousness and lawlessness? Or what partnership has light with darkness?
Revelation 2:4
Yet I have this against you--that you no longer love Me as you did at first.