Open Exodus 4:21-23.
Moses sets out for Egypt to confront Pharaoh with YHWH’s claim of sovereignty over the Hebrew people:
Exodus 4:22–23 (ESV)
22 Then you shall say to Pharaoh, ‘Thus says the Lord, Israel is my firstborn son, 23 and I say to you, “Let my son go that he may serve me.”
The descendants of Jacob are God’s family. God has promised to restore the blessing of his governance to the nations through them. So God “fathers” the nation of Israel: they are born through the exodus.
What a joyful contrast: serving YHWH rather than Pharaoh. Liberated from oppressive human rule, they’re the first nation to be a kingdom of God.