The Lord (to Moses): Now you shall see what I will do to Pharaoh: for he shall let them go because of my strong hand, and he shall drive them out of his land because of my strong hand. (HCSB) I am the Lord. And I appeared to Abraham, to Isaac, and to Jacob, by the name of God Almighty, but by my name Jehovah I was not known to them. And I have also established my covenant with them, to give them the land of Canaan, the land of their pilgrimage, wherein they were strangers. And I have also heard the groaning of the children of Israel, whom the Egyptians keep in bondage; and I have remembered my covenant. Therefore say to the children of Israel, I am the Lord, and I will bring you out from under the burdens of the Egyptians, and I will rid you out of their bondage, and I will redeem you with an outstretched arm, and with great judgments: And I will take you to me for a people, and I will be to you a God: and you shall know that I am the Lord your God, which brings you out from under the burdens of the Egyptians. And I will bring you into the land, which I swore to give to Abraham, to Isaac, and to Jacob; and I will give it to you for an heritage: I am the Lord.
Moses spoke so to the children of Israel. But they did not listen to Moses for anguish of spirit and for cruel bondage.
The Lord (to Moses): Go in and speak to Pharaoh king of Egypt, that he let the children of Israel go out of his land.
Moses (to the Lord): Look, the children of Israel have not listened to me. How then shall Pharaoh hear me, who am of stammering lips?
The Lord spoke to Moses and to Aaron and gave them instructions for the children of Israel and for Pharaoh king of Egypt, to bring the children of Israel out of the land of Egypt.