Cp. Suetonius, Julius Caesar, 37: '. Inscription on the banners of the triumph of Gaius Julius Cesar, after his victory over Pharnaces, son of Mithridates, near Zela, in Pontus, 2 August 47 BC. See also Seneca the Elder, Suasoriæ, 2, 22.https://en.wikiquote.org/wiki/Parallel_Lives