Kommentar zu Schemot 25:23

קמתו THE HEIGHT THEREOF — i. e. the height of its legs together with the thickness of the table-board.

ועשית שלחן, after the Ark, which symbolised G’d’s throne on earth, as expressed by the words ונועדתי לך שם, “I will designate this for My meeting place with you,” (verse 22) had been completed, G’d commanded the construction of the Table and the Lamp stand, essential furnishings for a guest room, as we know from King II 4,10 where the lady in Shunem, planning to provide private accommodation for the prophet Elisha who was her frequent guest, discusses such details with her husband. According to our sages in Yuma 72 the crown-like border surrounding the surface of the table symbolised the crown of the kingdom of G’d. A king’s task in administering the affairs of state is divided into two aspects. 1) He must dispense justice, or appoint people who see to it that justice is dispensed. 2) He must concern himself with the defense of the realm, again, either personally, or by delegating his authority to loyal experts. This is how the people requesting that Samuel appoint a king for them defined the king’s duties in Samuel I 8,20. Accordingly, the table actually had two “crowns.” (this exegesis differs from that of Rashi who holds that there was only one such “crown.”) One of the “crowns” is for the table as such, the table symbolising the physical nourishment of the people and the general conduct of its affairs, the second symbolises an “enclosure, security fence,” מסגרת, a defensive system against harm to the people from whatever source, signaling that any attacker will not only be repelled but will be crushed.

אמתים ארכו, its length two cubits, etc. When you "cube" the dimensions of the Table, i.e. multiplying the two cubits length by one cubit width and by one and a half cubits height, you will find that you have a total of three cubits, or three times one cubit. This corresponds to the influence on our material world by the mystical dimension of the Celestial Table which represents the three levels of נצח, הוד and יסוד.