Jeremiah 9:6

“They bend their tongue,

as their bow, for falsehood.

They have grown strong in the land,

but not for truth;

for they proceed from evil to evil,

and they don’t know me,” says the LORD.

“Everyone beware of his neighbor,

and don’t trust in any brother;

for every brother will utterly supplant,

and every neighbor will go around like a slanderer.

Friends deceive each other,

and will not speak the truth.

They have taught their tongue to speak lies.

They weary themselves committing iniquity.

Therefore the LORD of Armies says,

“Behold, I will melt them and test them;

for how should I deal with the daughter of my people?

Their tongue is a deadly arrow.

It speaks deceit.

One speaks peaceably to his neighbor with his mouth,

but in his heart, he waits to ambush him.

Shouldn’t I punish them for these things?” says the LORD.

“Shouldn’t my soul be avenged on a nation such as this?