Arcana Coelestia#10651
10651. 'And you take their daughters for your sons' means affections for evil linked to truths. This is clear from the meaning of 'taking', when it refers to marriage, as being linked to; from the meaning of 'daughters' as affections for good, and in the contrary sense as affections for evil, dealt with in 2362, 3963; and from the meaning of 'sons' as truths, dealt with in 489, 491, 533, 1147, 3373, 4257, 9807, 10490.
Arcana Coelestia#2623
2623. 'A son' means the Divine Rational. This is clear from the meaning of 'a son'. In the internal sense of the Word 'a son' means truth, 489, 491, 533; and because truth is the principal element in the rational, 2072, 2189, 'a son' also means the rational. But here the Divine Rational is meant in which the principal element is good. 'Isaac' too, to whom 'a son' refers, represents this good, as will be shown further on.