Jeremiah 9:4 in the King James Version
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.
Context
3 “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.
4 “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.
5 Friends deceive each other, and will not speak the truth. They have taught their tongue to speak lies. They weary themselves committing iniquity.