
“If So-and-so challenges me, I shall lay before you a careful account of what I have said and done; if that does not satisfy him, I shall reciprocate his dislike of me.”
Siquidem locutus aliter fuerit, dabo operam ut rationem factorum meorum dictorumque reddam; si perseveraverit, in vicem eum odero.
From Suetonius, The Twelve Caesars, ch. 28