Histories

Herodotus

Herodotus. Godley, Alfred Denis, translator. Cambridge, MA; London: Harvard University Press; William Heinemann, Ltd., 1920-1925 (printing).

but whenever the season is at hand for the mares to conceive, they drive them into the countries of their neighbors, and then send the asses after them, until the mares are pregnant, and then they drive them home again.