Sefer Hasidim § 637

Jewish Mysticism
There is no throne without the Torah, and this is [the import of the poem] “At the time before creation He established the Torah and the throne.” Therefore the Torah is read on Sabbath. And there occurs seven times in Scripture [the expression] “enthroned on the cherubim” (yoshev ha-keruvim). Therefore, [on Sabbath] seven [sections in the Torah] are read, and it is as if the Shekhinah were placed on the throne of the cherubim.

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