Histories
Herodotus
Herodotus. Godley, Alfred Denis, translator. Cambridge, MA; London: Harvard University Press; William Heinemann, Ltd., 1920-1925 (printing).
In the summer, the abundant snow that has fallen in winter melts and pours from all sides into the Ister; so this snow-melt pours into the river and helps to swell it and much violent rain besides, as the summer is the season of rain.