Romans 1:32
Well aware of God's decree, that those who do such things deserve to die, not only are they guilty of them themselves, but they even applaud those who do them.
Romans 12:9
Let your love be sincere. Hate the wrong; cling to the right.
1 Corinthians 15:33
Do not be deceived. 'Good character is marred by evil company.'
2 Corinthians 6:14-16
Do not enter into inconsistent relations with those who reject the Faith. For what partnership can there be between righteousness and lawlessness? or what has light to do with darkness?
Revelation 2:4
But this I have against you--You have abandoned your first love.