Niccolò Machiavelli
Discourses on the First Decade of Titus Livius (Chap. 3.47) (English version)
That love of his Country should lead a good Citizen to forget private Wrongs.

While commanding as consul against the Samnites, Manlius was wounded in a skirmish. His army being thereby endangered, the senate judged it expedient to send Papirius Cursor as dictator to supply his place. But as it was necessary that the dictator should be nominated by Fabius, the other consul, who was with the army in Etruria, and as a doubt was felt that he might refuse to nominate Papirius, who was his enemy, the senate sent two messengers to entreat him to lay aside private animosity, and make the nomination which the public interest required. Moved by love of his country Fabius did as he was asked, although by his silence, and by many other signs, he gave it to be known that compliance was distasteful. From his conduct at this juncture all who would be thought good citizens should take example.