A quote
All this time the poor slaves may not move their lips, even to speak. The slightest murmur is repressed by the rod; even a chance sound,—a cough, a sneeze, or a hiccup,—is visited with the lash. There is a grievous penalty for the slightest breach of silence. All night long they must stand about, hungry and dumb.
Seneca·Letter 47 — On Master and Slave (§3)·trans. Gummere