Lactantius

“ But those parts, which we have said to be lengthened out from the body, either for the sake of walking, or of acting, or of flying, He would have to consist of bones, neither too long, for the sake of rapidity of motion, nor too short, for the sake of firmness, but of a few, and those large. For either they are two as in man, or four as in a quadruped. ”

“ Moreover, He made four limbs standing out from the very vessel of the body: two behind, which are in all animals—the feet; also two close to the head and neck, which supply various uses to animals. For in cattle and wild beasts they are feet like the hinder ones; but in man they are hands, which are produced not for walking, but for acting and controlling. [2] There is also a third class, in which those former limbs are neither feet nor hands ”