Romans 1:32
who, indeed, knowing the ordinance of God, that those who practice such things are worthy of death, not only do the same, but also consent with those who practice them.
Romans 12:9
Let love be without hypocrisy; abhorring that which is evil; cleaving to that which is good;
1 Corinthians 15:33
Be not deceived; evil companionships corrupt good morals.
2 Corinthians 6:14-16
Become not unequally yoked with unbelievers; for what fellowship have righteousness and lawlessness? And what communion has light with darkness?
Revelation 2:4
But I have it against you, that you left your first love.