Hebrews 9
18 Ref So that even the first agreement was not made without blood.
19 Ref For when Moses had given all the rules of the law to the people, he took the blood of goats and young oxen, with water and red wool and hyssop, and put it on the book itself and on all the people,
20 Ref Saying, This blood is the sign of the agreement which God has made with you.