Iuravit in mea verba tota Italia.
Notes from Wikiquote
XXV, 3-4. Translation by Thomas Bushnell
Behold them, conquerors of the world, the toga-clad race of Romans!
To seek to keep the established constitution unchanged argues a good citizen and a good man.
Quote text and notes from Wikiquote: Augustus (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.