Exodus 3:1-12
(burning bush)
Moses was keeping the flock of his father-in-law Jethro, the priest of Midian; he led his flock beyond the wilderness and came to Mount Horeb, the mountain of God. There the angel of the Lord appeared to him in a flame of fire out of a bush; he looked, and the bush was blazing, yet it was not consumed. Then Moses said, “I must turn aside and look at this great sight and see why the bush is not burned up.” When the Lord saw that he had turned aside to see, God called to him out of the bush, “Moses, Moses!” And he said, “Here I am.” Then he said, “Come no closer! Remove the sandals from your feet, for the place on which you are standing is holy ground.” He said further, “I am the God of your father, the God of Abraham, the God of Isaac, and the God of Jacob.” And Moses hid his face, for he was afraid to look at God.
Then the Lord said, “I have observed the misery of my people who are in Egypt; I have heard their cry on account of their taskmasters. Indeed, I know their sufferings, and I have come down to deliver them from the Egyptians and to bring them up out of that land to a good and spacious land, to a land flowing with milk and honey, to the country of the Canaanites, the Hittites, the Amorites, the Perizzites, the Hivites, and the Jebusites. The cry of the Israelites has now come to me; I have also seen how the Egyptians oppress them. Now go, I am sending you to Pharaoh to bring my people, the Israelites, out of Egypt.” But Moses said to God, “Who am I that I should go to Pharaoh and bring the Israelites out of Egypt?” He said, “I will be with you, and this shall be the sign for you that it is I who sent you: when you have brought the people out of Egypt, you shall serve God on this mountain.”
Exodus 13:18-22
(pillar of fire)
So God led the people by the roundabout way of the wilderness bordering the Red Sea. The Israelites went up out of the land of Egypt prepared for battle. And Moses took with him the bones of Joseph, who had required a solemn oath of the Israelites, saying, “God will surely come to you, and then you must carry my bones with you from here.” They set out from Succoth and camped at Etham, on the edge of the wilderness. The Lord went in front of them in a pillar of cloud by day, to lead them along the way, and in a pillar of fire by night, to give them light, so that they might travel by day and by night. Neither the pillar of cloud by day nor the pillar of fire by night left its place in front of the people.