Hebrews 9:18-20

Moffatt(i) 18 Hence even the first covenant of God's will was not inaugurated apart from blood; 19 for after Moses had announced every command in the Law to all the people, he took the blood of calves and goats, together with water, scarlet wool and hyssop, sprinkling the book and all the people, 20 and saying, This is the blood of that covenant which is God's command for you.