Exodus 6:4-6

"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."

"My covenant with them ..." This is exactly the covenant that Jehovah (in that name and identity) made with Abraham. Note the emphatic words:

I have established (Exodus 6:4).

I have heard (Exodus 6:5).

I have remembered (Exodus 6:5).

I AM JEHOVAH (Exodus 6:6).

I will bring (Exodus 6:6).

I will rid (Exodus 6:6).

I will redeem! (Exodus 6:6).

"And with great judgments ..." These had previously been hinted at (Exodus 3:20; 4:22), but had not previously been called judgments? The meaning of this is that the mighty plagues visited upon Egypt were not merely "wonders." They were judgments also, sent upon the nation by God Himself for the punishment of their sinful rebellion against His will. "They were punishments inflicted upon a proud and cruel nation by a Judge!"[29]

The glimpse of Calvary that appears here was mentioned by Unger:

Exodus as a book of redemption presents a type of all redemption. It is wholly from God (Exodus 3:7,8). It is through a Person (Exodus 2:2). It is by blood (Exodus 12:13,23,27). It is by power (Exodus 6:6).[30]