Exodus 24:13

Now Moses was pasturing the flock of Jethro his father-in-law, the priest of Midian; and he led the flock to the west side of the wilderness and came to Horeb, the mountain of God.

Then Yahweh said to Aaron, “Go to meet Moses in the wilderness.” So he went and encountered him at the mountain of God and kissed him.

So Moses said to Joshua, “Choose men for us and go out, fight against Amalek. Tomorrow I will take my stand on the top of the hill with the staff of God in my hand.”

Then Jethro, Moses’ father-in-law, came with his sons and his wife to Moses in the wilderness where he was camped, at the mount of God.

Thus Yahweh used to speak to Moses face to face, just as a man speaks to his friend. Then Moses would return to the camp, and his attendant Joshua the son of Nun, a young man, would not depart from the tent.

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,