Thus says the Lord, ‘Israel is my son, my firstborn…‘
In light of the wider book of the Exodus, one encounters a god (Yahweh) who is able to deliver His people (His “firstborn”) from all other powers and authorities and, thus, from the gods of Egypt. This sheds light on the death of the firstborn of Egypt and thus the preservation of Israel and all who gathered in obedience in each home dedicated to Yahweh’s provision.
Moses said, “Thus says the Lord: ‘About midnight I will go throughout Egypt, and all the firstborn in the land of Egypt will die, from the firstborn son of Pharaoh who sits on his throne, to the firstborn son of the slave girl who is at her hand mill, and all the firstborn of the cattle. There will be a great cry throughout the whole land of Egypt, such as there has never been, nor ever will be again. But against any of the Israelites not even a dog will bark against either people or animals, so that you may know that the Lord distinguishes between Egypt and Israel.’ (Exo.11:4-7 NET)
The preservation of the children of the god of Israel was a revelation of that god as true God, and the name of Yahweh as that God who had and was making covenant with Israel among all the nations. The children delivered from captivity (Exo.1-6) , preserved through judgment (Exo.7-13), passing through the waters (Exo.14-15:21), provided for in the wilderness (Exo.15:22-18:27), trembling at the mountain (Exo.19), and attending to the glorious, gracious, and holy presence of Yahweh in their midst (Exo.20-40). In all of this, and through all of this, the revelation of Yahweh as Yahweh (God of Israel) stands at the forefront…and as God of Israel, Yahweh is self-revealed as Father of Israel in every respect. Israel begins in the narrative as slaves building houses for the gods and rulers of Egypt and ends with building the tabernacle for Yahweh as sons and no longer slaves…as those brought into covenant relationship not simply as subjects, but sons of their God under the cloud of smoke and fire, eating and drinking at the table of their Lord and Father (Exo.40:34-38).
And thus at the first we read:
God answered, “I will be with you. And this is your sign that I am the one who has sent you: When you have brought the people out of Egypt, you will worship God at this very mountain.”
But Moses protested, “If I go to the people of Israel and tell them, ‘The God of your ancestors has sent me to you,’ they will ask me, ‘What is his name?’ Then what should I tell them?”
God replied to Moses, “I Am Who I Am. Say this to the people of Israel: I Am has sent me to you.” God also said to Moses, “Say this to the people of Israel: Yahweh, the God of your ancestors—the God of Abraham, the God of Isaac, and the God of Jacob—has sent me to you.
This is my eternal name,
my name to remember for all generations. (Exo.3:12-15 NLT, emphasis added)
And at the last:
Then the Lord came down in a cloud and stood there with him; and he called out his own name, Yahweh. The Lord passed in front of Moses, calling out,
“Yahweh! The Lord!
The God of compassion and mercy!
I am slow to anger
and filled with unfailing love and faithfulness.
I lavish unfailing love to a thousand generations.
I forgive iniquity, rebellion, and sin.
But I do not excuse the guilty.
I lay the sins of the parents upon their children and grandchildren;
the entire family is affected—
even children in the third and fourth generations.”
Moses immediately threw himself to the ground and worshiped. And he said, “O Lord, if it is true that I have found favor with you, then please travel with us. Yes, this is a stubborn and rebellious people, but please forgive our iniquity and our sins. Claim us as your own special possession.” (Exo.34:5-9 NLT, emphasis added)