Exodus 24:3-8

Moses told the people all the LORD’s words and laws for living. Then all of the people answered out loud together, “We will do all the things the LORD has said.” So Moses wrote down all the words of the LORD. And he got up early the next morning and built an altar near the bottom of the mountain. He set up twelve stones, one stone for each of the twelve tribes of Israel. Then Moses sent young Israelite men to offer whole burnt offerings and to sacrifice young bulls as fellowship offerings to the LORD. Moses put half of the blood of these animals in bowls, and he sprinkled the other half of the blood on the altar. Then he took the Book of the Agreement and read it so the people could hear him. And they said, “We will do everything that the LORD has said; we will obey.” Then Moses took the blood from the bowls and sprinkled it on the people, saying, “This is the blood that begins the Agreement, the Agreement which the LORD has made with you about all these words.”