In Genesis 15:2, this signifies a state deprived of good and truth and thus no longer representing the church. (Arcana Coelestia 4886[3]) Childless also signifies that there is no internal church. (Arcana Coelestia 1794)

Daughters of Canaan (Genesis 28:8) signify affections of truth that are not genuine, whereas in Genesis 28:1, they signify the affections of what is false and evil.

(References: Arcana Coelestia 1060, 1167, Genesis 1, 9:18)