"Now you will see what I will do to Pharaoh," the LORD told Moses. "When he feels my powerful hand upon him, he will let the people go. In fact, he will be so anxious to get rid of them that he will force them to leave his land!"
And God continued, "I am the LORD.
I appeared to Abraham, to Isaac, and to Jacob as God Almighty, though I did not reveal my name, the LORD, to them.
References for Exodus 6:3
And I entered into a solemn covenant with them. Under its terms, I swore to give them the land of Canaan, where they were living.
You can be sure that I have heard the groans of the people of Israel, who are now slaves to the Egyptians. I have remembered my covenant with them."
"Therefore, say to the Israelites: 'I am the LORD, and I will free you from your slavery in Egypt. I will redeem you with mighty power and great acts of judgment.