5 Friend deceives friend, and no one speaks the truth. They have taught their tongues to lie; they weary themselves with sinning.

Read Jeremiah 9:5 Using Other Translations

And they will deceive every one his neighbour, and will not speak the truth: they have taught their tongue to speak lies, and weary themselves to commit iniquity.
Everyone deceives his neighbor, and no one speaks the truth; they have taught their tongue to speak lies; they weary themselves committing iniquity.
They all fool and defraud each other; no one tells the truth. With practiced tongues they tell lies; they wear themselves out with all their sinning.