Exodus 24:4 WEB

²  Moses alone shall come near to Yahweh, but they shall not come near, neither shall the people go up with him.'

³  Moses came and told the people all the words of Yahweh, and all the ordinances; and all the people answered with one voice, and said, 'All the words which Yahweh has spoken will we do.'

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

⁵  He sent young men of the children of Israel, who offered burnt offerings and sacrificed peace-offerings of oxen to Yahweh.

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