Histories
Herodotus
Herodotus. Godley, Alfred Denis, translator. Cambridge, MA; London: Harvard University Press; William Heinemann, Ltd., 1920-1925 (printing).
When a woman is sick, she is put to death like the men by the women who are her close acquaintances. As for one that has come to old age, they sacrifice him and feast on his flesh; but not many reach this reckoning, for before that everyone who falls ill they kill.
There are other Indians, again, who kill no living creature, nor plant anything, nor are accustomed to have houses; they eat grass, and they have a grain growing naturally from the earth in its husk, about the size of a millet-seed, which they gather with the husk and boil and eat. When any one of them falls sick, he goes into the desert and lies there, and no one notices whether he is sick or dies.