Exodus 24:5-8

5 And he sent young men of the children of Israel, which offered burnt offerings, and sacrificed peace offerings of oxen to the LORD.

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

7 And he took the book of the covenant, and read in the audience of the people: and they said, All that the LORD has said will we do, and be obedient.

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