Arcana Coelestia # 1960
1960. That 'Hagar bore Abram a son' means the rational man born from that coming together and conception is clear from the representation and meaning of 'Hagar', 'Abram', and 'son'. 'Hagar' means the life which is present in the affection for knowledge and which belongs to the exterior man, as stated above in 1895, 1896; 'Abram' means the Lord's Internal Man, 1893, 1950; and 'a son' means truth, and so the truth which this rational possessed, 264, 489, 491, 533, 1147. Consequently the words 'Hagar bore for Abram' mean the rational man born from that conception and coming together. This is the sense into which the sense of the letter is converted when it comes to or resides with angels.
Child, to be with
In Revelation 12:2, this signifies to bring forth things which belong to spiritual life. (Apocalypse Revealed 534)
In Genesis 38:24, to be with child signifies to produce something.
(Odkazy: Arcana Coelestia 4904)