The blood they shared symbolically was the blood of sheep and goats. The blood in the veins of the Israelites was no different after the covenant ceremony. Thus the Old Covenant had signs, but they were not efficacious. For the sign of the Old Covenant blood to be efficacious, it would not only signify a blood relation, but would actually effect it. Indeed, this is precisely what the blood of the New Covenant effects. Jesus’ words over the cup at the Last Supper transform the wine into blood. And