Musar su Genesi 29:35

King David held on to the קו המלכות, i.e. the fourth "line." This is what is commonly known as מגן דוד, the shield of David. [קוים is an expression used in Kabbalah to describe the conversion of concepts into a practical effect in our lives. The concept חסד becomes רחמים, i.e. applied חסד, by means of such a קו, line. Ed.] The Zohar (Sullam edition page 70), commenting on Genesis 29,35 "she stopped bearing children," explains that the word ותעמד is a reference to the establishment of this fourth leg of G–d's throne, and that anyone who challenges the kingdom of David is considered as challenging the שכינה, the reason being that the fourth leg of the throne is supplied by the kingdom of David on earth. David is the מרכבה, carrier of G–d's Glory down here in our domain. Once that fourth leg has been contributed to G–d's Throne, His name י-ה-ו-ה will be complete. The root of the line חסד is the letter יוד. The root of the line דין is the first ה"א in that Name, whereas the line רחמים is the letter ו"או. These three lines together, formed through the attributes of the patriarchs, form a מרכבה. By adding the last letter ה"א of the Ineffable Name, G–d's name is made complete, whole. Once the Kingdom of David will flourish as that of the Messiah, once the prediction: והיתה לה' המלוכה (Ovadiah 1, 21) will be realized, the other half of that prophecy ביום ההוא יהיה ה' אחד ושמו אחד will be fulfilled also (Zachariah 14,9). The final letter in each of the last three words of that latter prophecy together spell דוד. A close look at the name יהודה will reveal some remarkable allusions. Firstly, it contains the letters of the Ineffable Name plus the letter ד. That letter, or rather the number 4 that it represents, is an allusion to the fourth leg of G–d's Throne.

Joseph is the pillar the world rests on because the צדיק righteous person, is the יסוד, foundation of the universe, the pillar which supports the universe. The feet are the support of the rest of the "body." It follows that between them they form the "feet" of the שכינה. We view Joseph as the "pillar" of the world, Yehudah as the fourth leg of G–d's throne, enabling it to "stand." When the Torah reports the birth of Yehudah, we find that it continues with the words ותעמוד מלדת, "She, (Leah) stood from giving birth." The message that the Torah wishes to convey is that it was this birth that enabled the throne of G–d to stand firmly. Finally, Benjamin is perceived as the ירך, the thigh or reproductive organ of the body. He had not bowed to Esau because he had not been born when Jacob met his brother. He was therefore fit to serve as the site of the altar, from which G–d's blessings are received.