569. The Cup of Blessing is used only when there are three WHO ATE TOGETHER. It is blessed from the secret of the three Patriarchs, FOR MALCHUT, WHICH IS THE SECRET OF THE CUP OF BLESSING, IS BLESSED FROM CHESED, GVURAH AND TIFERET OF ZEIR ANPIN THAT ARE CALLED 'PATRIARCHS.' Therefore, a cup is necessary only when there are three men. One should give the Cup of Blessing with the right and left HANDS, and receive it in both, because MALCHUT is given between the right and left OF ZEIR ANPIN. Afterwards one should leave it only in his right hand, because from there it is blessed, MEANING FROM THE LIGHT OF THE CHASSADIM THAT ARE IN THE RIGHT OF ZEIR ANPIN.
570. Ten things were said about the Cup of Blessing and they are all proper, because the Cup of Blessing, WHICH IS MALCHUT, is perfected by ten, NAMELY THE TEN SFIROT, as the friends have established. It is necessary to look at the Cup of Blessing with the eyes, because it is written, "The eyes of Hashem your Elohim are always upon it" (Devarim 11:12) ON THE LAND WHICH IS MALCHUT, THAT IS CALLED 'CUP OF BLESSING.' It should not be removed from the eye, but should rather be looked at.
571. The Cup of Blessing is blessed with the blessing that the person makes over it to the Holy One, blessed be He, because it is the secret of Faith, NAMELY MALCHUT. It must be guarded with the highest guard, as it is the importance of the King, and it is for its sake that the table is blessed during the blessing after the meal that one blesses.
572. The table OF A PERSON must never be empty, because the blessing is not present on an empty table, as we have established, "Tell me, what have you in the house" (II Melachim 4:2). Therefore, the table should not appear empty, because the supernal blessings dwell only in a whole place. This is the secret of, "And in the hearts of all that are wise hearted I have put wisdom" (Shemot 31:6), MEANING AFTER HE HAS BEEN PERFECTED WITH WISDOM, HE IS GIVEN WISDOM. "He gives Wisdom to the wise" (Daniel 2:21). Upon this secret is based the table of the shewbread, THAT IT IS NEVER EMPTY, as it is written, "And you shall set upon the table shewbread before Me always" (Shemot 25:30).