Genesis 22:13

13.And, behold, behind him a ram. What the Jews feign respecting this ram, as having been created on the sixth day of the world, is like the rest of their fictions. We need not doubt that it was presented there by miracle, whether it was then first created, or whether it was brought from some other place; for God intended to give that to his servant which would enable him, with joy and cheerfulness, to offer up a pleasant sacrifice: and at the same time he admonishes him to return thanks. Moreover, since a ram is substituted in the place of Isaac, God shows us, as in a glass, what is the design of our mortification; namely, that by the Spirit of God dwelling within us, we, though dead, may yet be living sacrifices. I am not ignorant that more subtle allegories may be elicited; but I do not see on what foundation they rest.