Arcana Coelestia #3560
3560. 'Whether you are my son, or not' means that it was not natural good. This is clear from the doubt expressed in these words and those immediately following. And because the rational is that which perceives what the natural is, and the nature of it, a perception that it was not natural good, or 'Esau', is meant.
Jeremiah 27:2-3
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Thus says Yahweh to me: Make bonds and bars, and put them on your neck;
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and send them to the king of Edom, and to the king of Moab, and to the king of the children of Ammon, and to the king of Tyre, and to the king of Sidon, by the hand of the messengers who come to Jerusalem to Zedekiah king of Judah;
