Exodus 6:1-4

Then the LORD said to Moses, “Now you will see what I will do to Pharaoh: Because of my mighty hand he will let them go; because of my mighty hand he will drive them out of his country.” God also said to Moses, “I am the LORD. I appeared to Abraham, to Isaac and to Jacob as God Almighty, but by my name the LORD I did not make myself fully known to them. I also established my covenant with them to give them the land of Canaan, where they resided as foreigners.