From The Book of Zohar, "Introduction of The Book of Zohar," Essay, "Letters of Rav Hamnuna Saba," Item 38
The letter Aleph stood still
And did not approach Him.
The Creator said to her:
"Aleph, Aleph,
Why have you not approached Me
Like the rest of the letters?"
She replied:
"I saw that all the letters
Departed You with empty hands,
And what would I do there?
Furthermore,
You have already given the letter, Bet,
This great gift,
And it is not befitting for the Supreme King
To transfer the gift
He gave to His servant
And give it to another."
Then the Creator said to her:
"Aleph Aleph,
Even though the world was created with the letter Bet,
You shall be the head of all letters.
I am designated only through you, and
You shall be the start of all calculations
And of all people's actions in the world.
And all unifications are only in the letter Aleph."