Romans 1:30

They became back-biters, slanderers, impious, insolent, boastful. They devised new sins. They disobeyed their parents.

2 Corinthians 12:20

For I am afraid that perhaps, when I come, I may find that you are not what I want you to be, and, on the other hand, that you may find that I am what you do not want me to be. I am afraid that I may find quarreling, jealousy, ill-feeling, rivalry, slandering, back-biting, self-assertion, and disorder.

Treasury of Scripture Knowledge

Summary

The north wind driveth away rain: so doth an angry countenance a backbiting tongue.

Bible References

So

Romans 1:30
They became back-biters, slanderers, impious, insolent, boastful. They devised new sins. They disobeyed their parents.
2 Corinthians 12:20
For I am afraid that perhaps, when I come, I may find that you are not what I want you to be, and, on the other hand, that you may find that I am what you do not want me to be. I am afraid that I may find quarreling, jealousy, ill-feeling, rivalry, slandering, back-biting, self-assertion, and disorder.