Strabo: Ares, the only god they worship
From The Geography
Translated by Horace Leonard Jones
Because of the scarcity of horses most of the Carmanians use asses, even for war; and they sacrifice an ass to Ares, the only god they worship, and they are a warlike people. No one marries before he has cut off the head of an enemy and brought it to the king; and the king stores the skull in the royal palace; and he then minces the tongue, mixes it with flour, tastes it himself, and gives it to the man who brought it to him, to be eaten by himself and his family; and that king is held in the highest repute to whom the most heads have been brought.