In his ninth consulship he had a slight illness in Campania, and returning at once to the city, he left for Cutiliaeº and the country about Reate, where he spent the summer every year. There, in addition to an increase in his illness, having contracted a bowel complaint by too free use of the cold waters, he nevertheless continued to perform his duties as emperor, even receiving embassies as he lay in bed. Taken on a sudden with such an attack of diarrhoea that he all but swooned, he said: "An emperor ought to die standing," and while he was struggling to get on his feet, he died in the arms of those who tried to help him, on the ninth day before the Kalends of July, at the age of sixty-nine years, seven months and seven days..— Suetonius, Lives of the Twelve Caesars, "Life of Vespasian" §24
Vespasian debased the denarius during his reign, reducing the silver purity from 93.5% to 90% – the silver weight dropping from 2.97 grams to 2.87 grams.
His last words are quoted in The Gambler, a 2014 remake of the 1974 James Caan film of the same name.