Arcana Coelestia # 2186
2186. 'And he stood before them under the tree' means consequent perception. This follows from the meaning of 'a tree' as perception, dealt with in 103, 2163. Above in verse 4 it was stated that the three men who came to Abraham were to recline under the tree, which meant that the Divine was to draw near to the perception of that state which was the Lord's at that time. Here however it is said that Abraham stood under the tree, which means that the Lord drew near to the Divine perception after He had prepared Himself, which is a reciprocal action. Anyone may see that it is not without a reason that reference is made to the three men and to Abraham standing under the tree, and that therefore this detail was included because of the arcana that lie hidden within these descriptions.
Leviticus 7:15-16
15
The flesh of the sacrifice of his peace offerings for thanksgiving shall be eaten on the day of his offering. He shall not leave any of it until the morning.
16
"'But if the sacrifice of his offering is a vow, or a freewill offering, it shall be eaten on the day that he offers his sacrifice; and on the next day what remains of it shall be eaten: