I guess it's based on the following sutta.
One who tells lies may eventually get into all other evil deeds.
This was said by the Blessed One, said by the Arahant, so I have heard: "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."
The person who lies,
who transgress in this one thing,
transcending concern for the world beyond:
there's no evil
he might not do.
Iti 25
And also:
The person who tells a lie,
who transgresses in this one thing,
transcending concern for the world beyond:
there's no evil
he might not do.
Dhp 176