Romans 1:32
Though they know God's righteous decree that those who do such things deserve death, they not only continue to do these very things but also approve of those who practice them.
Romans 12:9
Let love be genuine. Hate what is evil; cling to what is good.
1 Corinthians 15:33
Do not be deceived: "Bad company corrupts good morals."
2 Corinthians 6:14-16
Do not be yoked together with unbelievers. For what partnership have righteousness and lawlessness? Or what fellowship has light with darkness?
Revelation 2:4
But I have this against you, that you have left your first love.