Arcana Coelestia #2186
2186. And he stood before them under the tree. That this signifies the derivative perception, follows from the signification of a “tree,” as being perception (see n. 103, 2163). It has been already stated (verse 4), that the three men who came to Abraham lay down under a tree, by which was signified that the Divine approached the perception of that state in which the Lord then was. But it is here said that Abraham stood under the tree, by which is signified that the Lord approached Divine perception, after He had prepared Himself; and this is the reciprocality. Everyone can see that it is not without a cause, that mention is made of the three men and of Abraham standing under a tree, consequently that it was said for the sake of the arcana which lie hidden in these things.
Numbers 18:9-11
9
This shall be yours of the most holy things, [reserved] from the fire: every offering of theirs, even every meal offering of theirs, and every sin offering of theirs, and every trespass offering of theirs, which they shall render to me, shall be most holy for you and for your sons.
10
You shall eat of it like the most holy things. Every male shall eat of it. It shall be holy to you.
11
"This is yours, too: the wave offering of their gift, even all the wave offerings of the children of Israel. I have given them to you, and to your sons and to your daughters with you, as a portion forever. Everyone who is clean in your house shall eat of it.
