Literatura Drugiej Świątyni do Powtórzonego Prawa 20:1

But here the question is how it could be that the whole earth was watered by one fountain, not only on account of its size, but also because of the inequality of the mountainous and champaign situations? Unless, indeed, just as the whole force of the king's cavalry is called "the horse," so the whole multitude of the veins of the earth which supply drinkable water, may perhaps be called the fountain, inasmuch as they all bubble up like a fountain. And that expression is peculiarly appropriate which says that the fountain watered, not the whole earth, but its face; as in the living being it waters the chief and predominant part (the mind or the countenance). Since that is the most important part of the earth which can be good and fertile and productive, and that is the part which stands in need of the nourishment of fountains.

[62] For it says “If thou go out to war against thine enemies and see horse and rider,” that is passion, the insolent, the restive, the unruly, and the passion-loving mind mounted on it, “and a people more numerous than thou art,” even the devoted followers of these leaders advancing in serried mass “thou shalt not be afraid of them.” One as thou art thou shalt have One fighting on thy side, even the Ruler of all, as it says, “for the Lord Thy God is with thee” (Deut. 20:1).