No, Cicero does not quote an internal script fragment from Laberius that frames an exchange in oratio recta (direct speech). Instead, the famous real-life witty exchange in oratio recta occurs between Cicero and Laberius themselves, which was later recorded by Macrobius in his Saturnalia (2.3.10). [1, 2]

The Famous Real-Life Exchange

During Julius Caesar's games in 46 BC, the Roman knight and mime writer Decimus Laberius was forced by Caesar to perform on stage. Having lost his equestrian status by acting, Laberius walked into the audience to find a seat. [1, 2]

Cicero, mocking Caesar’s practice of overfilling the Senate house with new appointees, called out to Laberius in oratio recta: [1]

Cicero: "Recepissem te, nisi anguste sederem."
("I would have made room for you, if I weren't sitting so squeezed.") [1]

Laberius immediately delivered a sharp retort back to Cicero in oratio recta: [1]

Laberius: "Atqui soles duabus sellis sedere."
("And yet you usually sit on two seats.") [1]

This was a scathing political jab at Cicero’s reputation for being a fair-weather politician who constantly shifted allegiances between Caesar and Pompey (metaphorically riding two fences or sitting on two stools).[1]

What Cicero Actually Writes About Laberius

While Cicero does not formally quote dramatic dialogue from Laberius's plays in this manner, he does mention him in his personal letters:

• The "Lawyer in Britain" Mockery: In a letter to his friend Trebatius Testa (Ad Familiares 7.11), Cicero jokes that if Trebatius doesn't hurry home from Britain, Laberius will turn him into a ridiculous lawyer character in one of his farces. [1]
• Macrobius's Commentary: Macrobius explicitly notes that while both men were incredibly elegant and witty ("uterque elegantissime"), neither one observed proper moderation ("neuter in hoc genere servat modum") when trading these direct insults. [1]

If you are looking to narrow down this classical reference, I can help you with a few more details. Let me know:

• Are you looking for actual surviving text fragments of Laberius’s lost mimes?
• Do you need assistance tracking down other political put-downs or instances of oratio recta in Cicero’s letters?
• Would you like the exact Latin citations and context for Cicero's letters to Trebatius? [1]