In Genesis 18:7; 2 Samuel 12:4, this symbolizes earthly goodness. (Arcana Coelestia 2181)

2193. That 'I will certainly return to you about this time next year' means the joining together of the Divine with the Human is clear from the fact that Jehovah's coming to Abraham represented the Divine Perception which the Lord prepared Himself to receive, and so represented a joining together, as shown above. Thus the promise that He would certainly return to him has a similar meaning, namely the joining together of the Divine with the Human. 'At this time of life' is at the same time in the following year.