Moses went up to the mountain of God. Then the Lord called to him from the mountain, saying: This is what you will say to the house of Jacob; tell the Israelites:
Meanwhile Moses was tending the flock of his father-in-law Jethro, the priest of Midian. Leading the flock beyond the wilderness, he came to the mountain of God, Horeb.
The Lord used to speak to Moses face to face, as a person speaks to a friend. Moses would then return to the camp, but his young assistant, Joshua, son of Nun, never left the tent.