The History of Rome (1.17.11-1.18.4)

So gratified were the people at the proposal that, not to appear behindhand in generosity, they passed a resolution that it should be left to the senate to decree who should reign in Rome.

There[*] was living, in those days, at Cures, a Sabine city, a man of renowned justice and piety-Numa Pompilius. He was as conversant as any one in that age could be with all divine and human law.

His master is given as Pythagoras of Samos, as tradition speaks of no other. But this is erroneous, for it is generally agreed that it was more than a century later, in the reign of Servius Tullius, that Pythagoras gathered round him crowds of eager students, in the most distant part of Italy, in the neighbourhood of Metapontum, Heraclea, and Crotona.

Now, even if he had been contemporary with Numa, how could his reputation have reached the Sabines? From what places, and in what common language could he have induced any one to become his disciple? Who could have guaranteed the safety of a solitary individual travelling through so many nations differing in speech and character?

I believe rather that Numa's virtues were the result of his native temperament and self-training, moulded not so much by foreign influences as by the rigorous and austere discipline of the ancient Sabines, which was the purest type of any that existed in the old days.