Exodus 24:18

Then the people saw that Moses delayed to come down from the mountain. So the people assembled about Aaron and said to him, “Arise, make us gods who will go before us; as for this Moses, the man who brought us up from the land of Egypt, we do not know what has become of him.”

So he was there with Yahweh forty days and forty nights; he did not eat bread or drink water. And he wrote on the tablets the words of the covenant, the Ten Commandments.

“When I went up to the mountain to receive the tablets of stone, the tablets of the covenant which Yahweh had cut with you, then I remained on the mountain forty days and nights; I neither ate bread nor drank water.

So he arose and ate and drank, and went in the strength of that food forty days and forty nights to Horeb, the mountain of God.

So He said, “Go forth and stand on the mountain before Yahweh.” And behold, Yahweh was passing by! And a great and strong wind was tearing up the mountains and breaking in pieces the rocks before Yahweh; but Yahweh was not in the wind. And after the wind an earthquake, but Yahweh was not in the earthquake.

For when every commandment had been spoken by Moses to all the people according to the Law, he took the blood of the calves and the goats, with water and scarlet wool and hyssop, and sprinkled both the book itself and all the people,