Exodus 4:22 New English Translation

²²You must say to Pharaoh, ‘This is what the Lord has said, “Israel is my son, my firstborn,^[a]

Exodus 4:22 sn The metaphor uses the word “son” in its connotation of a political dependent, as it was used in ancient documents to describe what was intended to be a loyal relationship with well-known privileges and responsibilities, like that between a good father and son. The word can mean a literal son, a descendant, a chosen king (and so, the Messiah), a disciple (in Proverbs), and here, a nation subject to God. If the people of Israel were God’s “son,” then they should serve him and not Pharaoh. Malachi reminds people that the Law said “a son honors his father,” and so God asked, “If I am a father, where is my honor?” (Mal 1:6).

New English Translation (NET)