The Lord said to Moses, “Come up the mountain to me, and while you are here, I will give you two stone tablets which contain all the laws that I have written for the instruction of the people.”
God answered, “I will be with you, and when you bring the people out of Egypt, you will worship me on this mountain. That will be the proof that I have sent you.”
He is the one who was with the people of Israel assembled in the desert; he was there with our ancestors and with the angel who spoke to him on Mount Sinai, and he received God's living messages to pass on to us.