The Histories · 4.58

So many are the rivers of note with which the Scythians are provided: and for cattle the grass which comes up in the land of Scythia is the most productive of bile of any grass which we know; and that this is so you may judge when you open the bodies of the cattle.

Herodotus of Halicarnassus · trans. G. C. Macaulay, 1890
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