Hippolytus

“ Ocellus, however, the Lucanian, and Aristotle, derive the universe from five principles; for, along with the four elements, they have assumed the existence of a fifth, and (that this is) a body with a circular motion; and they say that from this, things celestial have their being. But the disciples of Empedocles supposed the generation of the universe to have proceeded from six principles. For in the passage where he says, “Four roots of all things hear thou first,” he produces generation out of four principles. ”