Arcana Coelestia # 3262
3262. Verse 12 And these are the generations of Ishmael, Abraham's son, whom Hagar the Egyptian, Sarah's servant-girl, bore to Abraham. 'These are the generations of Ishmael, Abraham's son' means derivatives of the spiritual Church represented by Ishmael. 'Whom Hagar the Egyptian, Sarah's servant-girl, bore to Abraham' means the birth of the spiritual man brought about by Divine influx into the affection for knowledge.
Arcana Coelestia # 491
491. The same things are meant by 'sons and daughters' in verses 4, 7, 10, 13, 16, 19, 26, 30, of this chapter, but the character of a Church determines that of its 'sons and daughters', or goods and truths. Here they are truths and goods that men perceived most clearly, for they have regard to the Most Ancient Church, the head and forefather of all other Churches that followed after it.