Romans 1:32
who, knowing the rightfulness of God, that those who do such things are worthy of death, not only do the same, but they even delight in those who are doing them.
Romans 12:9
Let love be free from hypocrisy. Abhorring the evil, cleaving to the good:
1 Corinthians 15:33
Be not deceived: Evil communications corrupt good manners.
2 Corinthians 6:14-16
Be not unequally yoked together with unbelievers: for what participation is there to righteousness and unrighteousness? or what fellowship has light unto darkness?
Revelation 2:4
But I have something against you, because you have left your first love.