Exodus 24:9

6 And Moses took half the blood and put it in basins; draining out half of the blood over the altar.

7 And he took the book of the agreement, reading it in the hearing of the people: and they said, Everything which the Lord has said we will do, and we will keep his laws.

8 Then Moses took the blood and let it come on the people, and said, This blood is the sign of the agreement which the Lord has made with you in these words.

9 Then Moses and Aaron, Nadab, and Abihu, and seventy of the chiefs of Israel went up:

10 And they saw the God of Israel; and under his feet there was, as it seemed, a jewelled floor, clear as the heavens.

11 And he put not his hand on the chiefs of the children of Israel: they saw God, and took food and drink.

12 And the Lord said to Moses, Come up to me on the mountain, and take your place there: and I will give you the stones on which I have put in writing the law and the orders, so that you may give the people knowledge of them.