Exodus 24:4-8

4And Moses wrote all the words of Jehovah, and rose up early in the morning, and built an altar under the mountain, and twelve pillars, according to the twelve tribes of Israel.

5And he sent the youths of the children of Israel, and they offered up burnt-offerings, and sacrificed sacrifices of peace-offering of bullocks to Jehovah.

6And Moses took half the blood, and put [it] in basons; and half of the blood he sprinkled on the altar.

7And he took the book of the covenant, and read [it] in the ears of the people; and they said, All that Jehovah has said will we do, and obey!

8And Moses took the blood, and sprinkled [it] on the people, and said, Behold the blood of the covenant that Jehovah has made with you concerning all these words.