Altar stone
In Exodus 20:25, this signifies truths formed from good, or good in form, to signifies that nothing of self-intelligence should be involved in its forming. (Apocalypse Explained 391[21, 21])
Arcana Coelestia #3684
3684. 'And that Jacob had listened to his father and to his mother' [means obedience and affection]. This is clear from the meaning of 'listening to someone' or hearkening as obeying, dealt with in 2542. Doing so 'to father and mother' means obedience due to affection.