Romans 1:32
Though they knew well the ordinance of God, that those who practise such vices are worthy of death, they not only continue to do the same, but were even applauding those who practise vice.
Romans 12:9
Let love be without insincerity. Abhor what is evil; wed yourselves to what is good.
1 Corinthians 15:33
Do not deceive yourselves. Evil companions ruin good morals.
2 Corinthians 6:14-16
Be not unequally yoked with unbelievers; for what fellowship has righteousness with lawlessness? what communion has light with darkness?
Revelation 2:4
But I have this against you, that you have left your first love.