Pesiqta Rabbati 33, 155b

Jewish Mysticism
I appeared to them in several images (demuyot). At the sea I appeared to them as a warrior doing battle as it is written “The Lord, the Warrior” (Exod. 15-3). And Sinai I appeared as an elder teaching Torah… At the Tabernacle I appeared to them as a bridegroom entering his chamber. This is [the meaning of] “what can I liken to You.” The Holy One, blessed be He, said to Israel- Did I not appear to the prophets in many images… as it is written “I multiplied great visions and through the prophets I was imaged.”

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