Jeremiah 9:5 in the World English Bible
Friends deceive each other, and will not speak the truth. They have taught their tongue to speak lies. They weary themselves committing iniquity.
Context
4 Take ye heed every one of his neighbour, and trust ye not in any brother: for every brother will utterly supplant, and every neighbour will walk with slanders.
5 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.
6 Thine habitation is in the midst of deceit; through deceit they refuse to know me, saith the LORD.