Exodus 6:2-13

And God spake unto Moses, and said unto him, I am Jehovah: and I appeared unto Abraham, unto Isaac, and unto Jacob, as 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 sojournings, wherein they sojourned. And moreover I have heard the groaning of the children of Israel, whom the Egyptians keep in bondage; and I have remembered my covenant. Wherefore say unto the children of Israel, I am Jehovah, 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 ye shall know that I am Jehovah your God, who bringeth you out from under the burdens of the Egyptians. And I will bring you in unto the land which I sware to give to Abraham, to Isaac, and to Jacob; and I will give it you for a heritage: I am Jehovah. And Moses spake so unto the children of Israel: but they hearkened not unto Moses for anguish of spirit, and for cruel bondage. And Jehovah spake unto Moses, saying, Go in, speak unto Pharaoh king of Egypt, that he let the children of Israel go out of his land. And Moses spake before Jehovah, saying, Behold, the children of Israel have not hearkened unto me; how then shall Pharaoh hear me, who am of uncircumcised lips? And Jehovah spake unto Moses and unto Aaron, and gave them a charge unto the children of Israel, and unto Pharaoh king of Egypt, to bring the children of Israel out of the land of Egypt.