The Zohar brings here the words of the ‘Faithful Shepherd’, who is Moses, explaining the 10 things to do for the meal. (see also Pinchas #620, https://dailyzohar.com/daily-zohar-1291/)
The blessing of washing the hands (Netilat Yadayim) before the meal purifies the hands. The Zohar teaches us that the light of blessings comes only to a pure vessel. If the hands are in an impure state, then they can not draw blessings. There is a special process and meditation to achieve pure hands.
The two hands have ten fingers for the Ten Sefirot and the ten sayings of the action of Creation. “And God said let there be…”
The fingers have 14 joints each and together 28 as the number of letters in the first verse of the Torah and the numerical value of the for כח ‘force’.
We hold the water vessel (‘Natlan’) with the right hand for the aspect of Chassadim that channeled from the Right column. We transfer the Natlan to the left hand to serve the right and pour twice (14+14=28) for the YHVH name of Atzilut (Chokmah, 72), then we transfer the natlan to the right hand (we may refill it with water for additional Chassadim and blessing) and pour twice on the left hand for the YHVH name of the world of Beriah (Binah, 63). We pour the water on the hands from the wrist down.
Then we rub the two hands together and say the blessing while raising the hands above the level of our eyes, for the YHVH name of Zeir Anpin (45), world of Yetzirah.
This process that is called “Netilat Yadayim”, eliminates all Klipot/spiritual impurities from our hands, allowing us to make pure connection to the food, world of Asiah (action, 52).
Only with proper blessings we can eat and benefit spiritually, otherwise, we consume the food like animals.
Another aspect of 14 is in the body, unifying Right and Left. We have three joints in each hand and three joints in each leg, together 12. We get 14 when we add one for the body and one for Yessod (sexual organ) for unification and balance.
Daily Zohar # 2508 – Ekev – How to bring blessings to your hands