Exodus 24:4-8

24:4 and Moses wrote down all the words of the Lord. Early in the morning he built an altar at the foot of the mountain and arranged twelve standing stones – according to the twelve tribes of Israel. 24:5 He sent young Israelite men, and they offered burnt offerings and sacrificed young bulls for peace offerings to the Lord. 24:6 Moses took half of the blood and put it in bowls, and half of the blood he splashed on the altar. 24:7 He took the Book of the Covenant and read it aloud to the people, and they said, “We are willing to do and obey all that the Lord has spoken.” 24:8 So Moses took the blood and splashed it on the people and said, “This is the blood of the covenant that the Lord has made with you in accordance with all these words.”