Kabbalah Library
Zohar for All, Volume 3
And He Said, “I Will Surely Return” – 1
138) “And He said, ‘I will surely return to you.’” It should have said, “He will surely return,” since the key to visiting those who are barren is in the hands of the Creator, and not in the hands of another messenger.
139) Three keys were not given to a messenger: Chaya, revival of the dead, and rains [also corporeality in Hebrew]. Since they were not given to a messenger, why does it say, “I will surely return to you,” which means that the angel would return when the time comes and will visit her? Instead, the Creator who stood over them said it. This is why it is written, “And He said, ‘I will surely return to you.’”
140) Wherever it writes, “And he said,” or “And he called,” without mentioning who is saying or calling, it is the angel of the covenant, the Shechina. And everything is said in the Creator because the Shechina is the Creator. This is why it is written, “And He said, ‘I will surely return to you,’” since the Creator, who has the key for the barren in His hand, will say, “I will surely return.”