The Theocracy: or Immediate Government by God was Established On: The Right of Redemption
Source: TTT
Exodus 6:6, 7
Therefore tell the Israelites: ‘I am the LORD, and I will bring you out from under the yoke of the Egyptians and deliver you from their bondage. I will redeem you with an outstretched arm and with mighty acts of judgment. / I will take you as My own people, and I will be your God. Then you will know that I am the LORD your God, who brought you out from under the yoke of the Egyptians.
2 Samuel 7:23
And who is like Your people Israel—the one nation on earth whom God went out to redeem as a people for Himself and to make a name for Himself? You performed great and awesome wonders by driving out nations and their gods from before Your people, whom You redeemed for Yourself from Egypt.
Isaiah 43:3
For I am the LORD your God, the Holy One of Israel, your Savior; I give Egypt for your ransom, Cush and Seba in your place.