Biblical book of Ezekiel
Fishburn and Hughes: "The book of Ezekiel is the most mystical of the Old Testament books of prophecy. Ezekiel was deported by Nebuchadnezzar from Jerusalem to Babylon in 597, where he prophesied the redemption of the Jewish people from captivity. He preached the universality of God, insisting that the divine presence was confined neither to the Temple nor to Jerusalem. More than any other of the prophets, Ezekiel makes vivid use of symbolism; vision and ecstasy are his hallmarks.
The Aleph, CF 282: 'the vision of the four wheels' which is taken from Ezekiel 1:5-11, is a remarkable passage in that it does not seek to describe God directly but is a metaphor of the unfathomable appearance of his likeness. This powerful image later became the basis of a form of Jewish mysticism (Merkabah) concerned with speculations on the appearance of God on the Throne, and was also used in Christian iconography." (69)