Exodus 6:28-30; Exodus 6:7
Now when the LORD spoke to Moses in Egypt,
he said to him, "I am the LORD. Tell Pharaoh king of Egypt everything I tell you."
But Moses said to the LORD, "Since I speak with faltering lips, why would Pharaoh listen to me?"
I will take you as my own people, and I will be your God. Then you will know that I am the LORD your God, who brought you out from under the yoke of the Egyptians.