14 Thus did the Scriptures preach before-time of this lion and lion's cub. And in like manner also we find it written regarding Antichrist. For Moses speaks thus: “Dan is a lion's cub, and he shall leap from Bashan.” But that no one may err by supposing that this is said of the Saviour, let him attend carefully to the matter. “Dan,” he says, “is a lion's cub;”and in naming the tribe of Dan, he declared clearly the tribe from which Antichrist is destined to spring. For as Christ springs from the tribe of Judah, so Antichrist is to spring from the tribe of Dan. And that the case stands thus, we see also from the words of Jacob: “Let Dan be a serpent, lying upon the ground, biting the horse's heel.” What, then, is meant by the serpent but Antichrist, that deceiver who is mentioned in Genesis, who deceived Eve and supplanted Adam (πτερνι'σας, bruised Adam's heel)? But since it is necessary to prove this assertion by sufficient testimony, we shall not shrink from the task.
Source: The Antichrist (New Advent)