Histories

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.