'Twins in the womb,' as in Genesis 25:24, signifies that both good and truth, represented by Esau and Jacob, were conceived together.

The natural as to its good is from the good of the rational as a father, and as to its truth from the truth of the rational as a mother. Each of these is called soul, but good is primarily such. (Arcana Coelestia 3299)

In Genesis 38:27, this signifies that good and truth are both elements of the church and are pairs. (Arcana Coelestia 747, 4918)

(Reference: Arcana Coelestia 3298)

4829. 'Judah took a wife' means the Church which was for his descendants. This is clear from the representation of Tamar, to whom 'a wife' refers here, as the Church, dealt with below. Its being for his descendants is meant by the fact that he took her for Er his firstborn, so as to have descendants from them.