Exodus 24:3-5

New Revised Standard Version Catholic Edition

³ Moses came and told the people all the words of the Lord and all the ordinances; and all the people answered with one voice, and said, “All the words that the Lord has spoken we will do.” ⁴ And Moses wrote down all the words of the Lord. He rose early in the morning, and built an altar at the foot of the mountain, and set up twelve pillars, corresponding to the twelve tribes of Israel. ⁵ He sent young men of the people of Israel, who offered burnt offerings and sacrificed oxen as offerings of well-being to the Lord.