Augustine of Hippo

In the persons of the shepherds and the magi, the ox began to recognize his owner and the donkey his Master's crib. From the Jews came the horned ox, since among them the horns of the cross were prepared for Christ; from the Gentiles came the long-eared donkey, since it was concerning them that the prophecy had been made: "A people, which I knew not, has served me: at the hearing of the ear they have obeyed me." For the Owner of the ox and the Master of the donkey lay in a manger, yet he was furnishing common sustenance to both creatures.