This is what I wanted to tell Monsignor di Volterra [Soderini] when he came to Urbino, but I could not entrust him with the secret. Now that my opportunity has come, I have known very well how to make use of it, and I have done a great service to your masters.
Source, in full
Cesare to Machiavelli, after telling him why he ordered his men to attack the soldiers of Vitelli and Orsini (December 1502) as quoted by Rafael Sabatini, 'The Life of Cesare Borgia', Chapter XVII: The Beautiful Stratagem