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])
Hearken to my voice
'To hearken to my voice,' as mentioned in Genesis 26:5, signifies uniting the divine essence to the human by temptations.
(Reference: Arcana Coelestia 3381)