Pausanias Description of Greece 10.28.4

[4]
  On the bank of Acheron there is a notable group under the boat of Charon, consisting of a man who had been undutiful to his father and is now being throttled by him. For the men of old held their parents in the greatest respect, as we may infer, among other instances, from those in Catana called the Pious, who, when the fire flowed down on Catana from Aetna , held of no account gold or silver, but when they fled took up, one his mother and another his father. As they struggled on, the fire rushed up and caught them in the flames. Not even so would they put down their parents, and it is said that the stream of lava divided itself in two, and the fire passed on, doing no hurt to either young men or their parents. These Catanians even at the present day receive honors from their fellow countrymen.

[4] On the bank of Acheron, there is a notable group under the boat of Kharon, consisting of a man who had been undutiful to his father and is now being throttled by him. For the men of old held their parents in the greatest respect, as we may infer, among other instances, from those in Catana called the Pious, who, when the fire flowed down on Catana from Aetna, held of no account gold or silver, but when they fled took up, one his mother and another his father. As they struggled on, the fire rushed up and caught them in the flames. Not even so would they put down their parents, and it is said that the stream of lava divided itself in two, and the fire passed on, doing no hurt to either young men or their parents. These Catanians even at the present day receive honors from their fellow countrymen.