Marcus Aurelius'
Meditations has been translated many times. Here is a 2002 version by Hays:
https://dn790009.ca.archive.org/0/it...GeorgeHays.pdf
From Book 9:
1. Injustice is a kind of blasphemy. Nature designed rational beings for each other’s sake: to help—not harm—one another, as they deserve. To transgress its will, then, is to blaspheme against the oldest of the gods.
And to lie is to blaspheme against it too. Because “nature” means the nature of that which is. And that which is and that which is the case are closely linked, so that nature is synonymous with Truth—the source of all true things. To lie deliberately is to blaspheme—the liar commits deceit, and thus injustice. And likewise to lie without realizing it. Because the involuntary liar disrupts the harmony of nature— its order. He is in conflict with the way the world is structured. As anyone is who deviates toward what is opposed to the truth—even against his will. Nature gave him the resources to distinguish between true and false. And he neglected them, and now can’t tell the difference.