Jeremiah 9:7-9

Therefore, this is what the LORD of Heaven’s Armies says: “See, I will melt them down in a crucible and test them like metal. What else can I do with my people? For their tongues shoot lies like poisoned arrows. They speak friendly words to their neighbors while scheming in their heart to kill them. Should I not punish them for this?” says the LORD. “Should I not avenge myself against such a nation?”