Jeremiah 9:6-8

New Catholic Bible

⁶ With their repeated acts of oppression and deceit,
    they refuse to acknowledge me, says the Lord.
⁷ Therefore, thus says the Lord of hosts:
    Now I will refine and test them.
    How else should I deal with this people?
⁸ Their tongue is a deadly arrow;
    their mouth utters words of deceit.
They speak cordially with their neighbors,
    but inwardly, they are plotting to ambush them.