Isaiah 11:9

And in other words also again the prophet declared the self-same thing, thus saying, "Then wolves and lambs shall feed together." For like as here by the hills and valleys, he meant that incongruities of character are blended into one and the same evenness of self-restraint, so also there, by the characters of the brute animals indicating the different dispositions of men, he again spoke of their being linked in one and the same harmony of godliness. Here also, as before, stating the cause. That cause is, "There shall be He that riseth to reign over the Gentiles, in Him shall the Gentiles trust:" much the same as here too he said, "All flesh shall see the salvation of God," everywhere declaring that the power and knowledge of these our Gospels would be poured out to the ends of the world, converting the human race, from a brutish disposition and a fierce temper to something very gentle and mild.