Romans 1:32
who, acknowledging the judgment of God, that those who practice such things are worthy of death, not only do them, but approve those who practice them.
Romans 12:9
Let love be without hypocrisy. Abhor that which is evil; cleave to that which is 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 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.