Jeremiah 9:4-8

4“Let everyone beware of his neighbor And do not trust any brother. For every brother is a supplanter [like Jacob, a deceiver, ready to grab his brother’s heel], And every neighbor goes around as a slanderer.

5Everyone deceives and mocks his neighbor And does not speak the truth. They have taught their tongue to speak lies; They exhaust themselves with sin and cruelty.

6Your dwelling is in the midst of deceit [oppression upon oppression and deceit upon deceit]; Through deceit they refuse to know (understand) Me,” says the Lord.

7Therefore thus says the Lord of hosts, “Behold, I will refine them [through suffering] and test them; For how else should I deal with the daughter of My people?

8Their tongue is a murderous arrow; It speaks deceit; With his mouth one speaks peace to his neighbor, But in his heart he lays traps and waits in ambush for him.