Sure, a lot of people are more familiar with the quote as attributed to Conan the Barbarian, but I came across it when reading about Genghis Khan. Besides, Conan’s version isn’t nearly as embarrassingly edgy, so…
Anyway, I did some research when I was drawing this, and apparently the line might be entirely apocryphal. Maybe Genghis’ son said it? I don’t know.

On a different subject, if you are a new reader, I suggest using an RSS feed or similar method to keep up with this comic’s updates, since they can be a bit sporadic.