Anonymous text of the German Pietists, Merkavah Shelemah, 30a

Jewish Mysticism
The Shekhinah seen on the throne appears as very subtle, and whatever they saw was not a vision of the Creator, blessed be He, but rather He created something in the likeness of a human that sits on the throne of the Holy One, blessed He. He showed them an image, numerically equal to 236,000 myriad parasangs; this is the stature of the one who sits on the throne.

Translated by Elliot Wolfson in Through a Speculum that Shines- Vision and Imagination in Medieval Jewish Mysticism, Princeton- Princeton University Press, 1994.