Arcana Coelestia #3032
3032. 'Abraham said to him' means the Lord's perception coming from the Divine. This is clear from the meaning of 'saying' as perceiving, dealt with above in 3029, and from the representation of 'Abraham' as the Lord as regards the Divine Human, from which that perception came.
Seed
'A seed' signifies the ultimate and primary levels in a person. It also signifies good and truth from the Lord. In an opposite sense, it signifies falsity of doctrine and hellish falsity. 'A seed' signifies everyone who constitutes the Lord's spiritual kingdom and faith grounded in charity.
In Genesis 12:7, 8:15, 16, 'a seed' signifies love and everyone who has love.
(Referenties: Arcana Coelestia 1025)