In Context

3 They bend their tongue, as it were their bow, for falsehood; and they are grown strong in the land, but not for truth: for they proceed from evil to evil, and they don't know me, says Yahweh.

4 Take heed everyone of his neighbor, and don't trust in any brother; for every brother will utterly supplant, and every neighbor will go about with slanders.

5 They will deceive everyone his neighbor, and will not speak the truth: they have taught their tongue to speak lies; they weary themselves to commit iniquity.

6 Your habitation is in the midst of deceit; through deceit they refuse to know me, says Yahweh.

7 Therefore thus says Yahweh of Armies, Behold, I will melt them, and try them; for how else should I do, because of the daughter of my people?

8 Their tongue is a deadly arrow; it speaks deceit: one speaks peaceably to his neighbor with his mouth, but in his heart he lays wait for him.

Jeremiah 9:6 in Other Translations