Arcana Coelestia#2969
2969. 'The field of Ephron' means that which constitutes the Church. This is clear from the meaning of 'the field' as the Church, and also doctrine, dealt with in 368, 2936, and from the representation of 'Ephron' as those with whom the good and truth of faith, which constitute the Church, could be received, dealt with in 2933. Consequently 'the field of Ephron' means that which constitutes the Church.
Arcana Coelestia#2933
2933. 'And intercede for me with Ephron the son of Zohar' means those with whom the good and truth of faith could be received. This becomes clear from the fact that the field, and the cave in the field where Sarah was to be buried, was Ephron's. And because burial means regeneration, 2916, it follows that Ephron means those with whom the good and truth of faith could be received. 'The sons of Heth' too represents the same, insofar as they belonged to Ephron's city and insofar as they were people of that city. 'Interceding' here means being made ready to receive.