The Ister, the greatest of all rivers which we know, flows with the same volume in summer and winter; it is most westerly Scythian river of all, and the greatest because other rivers are its tributaries.

Those that make it great, five flowing through the Scythian country, are these: the river called by Scythians Porata and by Greeks Pyretus,Probably the +Prut [28.166,45.5] (river), Europe Pruth; the modern names of the other four rivers mentioned here are matters of conjecture. and besides this the Tiarantus, the Ararus, the Naparis, and the Ordessus.