This was said by the Blessed One, said by the Arahant, so I have heard: “Monks, for the person who transgresses in one thing, I tell you, there is no evil deed that is not to be done. Which one thing? This: telling a deliberate lie.”
For the person who lies,
who transgresses in this one thing,
transcending concern for the world beyond:
there’s no evil
not to be done.
See also: MN 61