Eleazar of Worms, MS British Museum 737, fol. 172a

Jewish Mysticism
YHWH is called the glorious name (shem ha-nikhbad), as it is written, “to revere this glorious Name,” le-yir’ah ’et ha-shem ha-nikhbad [= 1078] (Deut. 28-58). [This expression] equals numerically “to revere the four letters,” le-yir’ah dalet ’otiyyot [=1078], for it is glorious and it is not uttered as it is written on account of its great holiness. Other glorious names are above in the light surrounded by a cloud. Therefore the [expression] “They have placed My name there,” samu shemi sham appears fifty-two times in the Pentateuch, and fifty-two times [the word] cloud, to indicate that a cloud surrounds the glorious name above. Therefore the one who studies the name should wear beautiful clothes. The name is not mentioned unless beautiful clothes are worn, the garments of honor… Each of the names has a resplendent light and an enveloping cloud. The names of God are written about the throne of glory, on the pillars of glory.

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