Arcana Coelestia # 2922
2922. 'In the choicest of our graves' means well-pleasing in regard to regeneration. This is clear from the meaning of 'choosing', 'a choice', and 'choicest' as that which is preferred or well-pleasing, and from the meaning of 'a grave' as resurrection and regeneration, dealt with above in 2916.
Genesis 49:30-32
30
in the cave that is in the field of Machpelah, which is before Mamre, in the land of Canaan, which Abraham bought with the field from Ephron the Hittite as a burial place.
31
There they buried Abraham and Sarah, his wife. There they buried Isaac and Rebekah, his wife, and there I buried Leah:
32
the field and the cave that is therein, which was purchased from the children of Heth."