Arcana Coelestia #2095
2095. 'At the set time next year' means a state of union at that time. This is clear from what has been stated about Abraham's age, that he was 'a son of a hundred years', and about Sarah's, that she was 'a daughter of ninety years', when Isaac was to be born, which meant that at that time the Rational within the Lord's Human Essence would be united to the Divine Essence and that truth joined to good was to achieve this, dealt with above in 1988, 2074, 2075. Consequently 'next year' means a state of union.
Arcana Coelestia #2074
2074. That 'will one be born to a son of a hundred years?' means that in that case the Rational belonging to the Lord's Human Essence would be united to the Divine Essence is clear from the meaning of 'a hundred', regarding which see above, in 1988.