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What is actually agreed to when men ask and give quarter.
And that which men do when they demand, as it is now called, quarter (which the Greeks called Zogria, taking alive) is to evade the present fury of the victor by submission, and to compound for their life with ransom or service: and therefore he that hath quarter hath not his life given, but deferred till further deliberation; for it is not a yielding on condition of life, but to discretion. And then only is his life in security, and his service due, when the victor hath trusted him with his corporal liberty. For slaves that work in prisons, or fetters, do it not of duty, but to avoid the cruelty of their task-masters.
Hobbes, Lev XX 12