Exodus 24:3-4

MLV(i) 3 And Moses came and told the people all the words of Jehovah and all the ordinances. And all the people answered with one voice and said, All the words which Jehovah has spoken will we
do.
4 And Moses wrote all the words of Jehovah and rose up early in the morning and built an altar below the mountain and twelve pillars, according to the twelve tribes of Israel.