Exodus 6:6-8

Therefore, say to the children of Israel, ‘I am the LORD, and I will bring you out from under the burdens of the Egyptians, and I will free you from their bondage. I will redeem and rescue you with an outstretched (vigorous, powerful) arm and with great acts of judgment [against Egypt]. Then I will take you for My people, and I will be your God; and you shall know that I am the LORD your God, who redeemed you and brought you out from under the burdens of the Egyptians. I will bring you to the land which I swore to give to Abraham, Isaac, and Jacob (Israel); and I will give it to you as a possession. I am the LORD [you have the promise of My changeless omnipotence and faithfulness].’ ”