Jeremiah 9:4-9

4“Beware of your friends; do not trust anyone in your clan. For every one of them is a deceiver, and every friend a slanderer. 5Friend deceives friend, and no one speaks the truth. They have taught their tongues to lie; they weary themselves with sinning. 6You live in the midst of deception; in their deceit they refuse to acknowledge me,” declares the Lord. 7Therefore this is what the Lord Almighty says: “See, I will refine and test them, for what else can I do because of the sin of my people? 8Their tongue is a deadly arrow; it speaks deceitfully. With their mouths they all speak cordially to their neighbors, but in their hearts they set traps for them. 9Should I not punish them for this?” declares the Lord. “Should I not avenge myself on such a nation as this?”