From Cicero’s First Oration Against Cateline, Section 1:
Quo usque tandem abutere, Catilina, patientia nostra? quam diu etiam furor iste tuus nos eludet?
When, O Catiline, do you mean to cease abusing our patience? How long is that madness of yours still to mock us?
This is the opening line of Cicero’s most famous speech – his introduction to his prosecution of Cateline, a would-be usurper of the Roman government. Cateline was eventually tried and convicted. Cicero’s sentiment here is similar to what Congressmen are saying to the IRS officials today.