Anabasis

From there they marched all the following day through snow, and many of the men fell ill with hunger-faintness. And Xenophon, with the rear-guard, as he came upon the men who were falling by the way, did not know what the trouble was.

But as soon as a person who was acquainted with the disease had told him that they manifestly had hunger-faintness, and if they were given something to eat would be able to get up, he went around among the baggage animals, and wherever he saw anything that was edible, he would distribute it among the sick men, or send hither and thither people who had the strength to run along the lines, to give it to them.