'Shadow' in the Bible

who serve a copy and shadow of the heavenly things, even as Moses was warned by God when he was about to make the tabernacle, for he said, "See, you shall make everything according to the pattern that was shown to you on the mountain."

For the law, having a shadow of the good to come, not the very image of the things, can never with the same sacrifices year by year, which they offer continually, make perfect those who draw near.