Exodus 5:20 – 6:9 — “And they met Moses and Aaron, who stood in the way, as they came forth from Pharaoh: And they said unto them, The Lord look upon you, and judge; because ye have made our savour to be abhorred in the eyes of Pharaoh, and in the eyes of his servants, to put a sword in their hand to slay us.  And Moses returned unto the Lord, and said, Lord, wherefore hast thou so evil entreated this people? why is it that thou hast sent me?  For since I came to Pharaoh to speak in thy name, he hath done evil to this people; neither hast thou delivered thy people at all.

6 Then the Lord said unto Moses, Now shalt thou see what I will do to Pharaoh: for with a strong hand shall he let them go, and with a strong hand shall he drive them out of his land.  And God spake unto Moses, and said unto him, I am the Lord:  And I appeared unto Abraham, unto Isaac, and unto Jacob, by the name of God Almighty, but by my name Jehovah was I 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.  Wherefore say unto 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 a stretched out 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 the Lord your God, which bringeth you out from under the burdens of the Egyptians.  And I will bring you in unto the land, concerning the which I did swear to give it to Abraham, to Isaac, and to Jacob; and I will give it you for an heritage: I am the Lord.  And Moses spake so unto the children of Israel: but they hearkened not unto Moses for anguish of spirit, and for cruel bondage.“