Prose
S. B. U. II. 7
In plain words
There is nothing to translate on this line. It is only the printer's own reference mark, 'S. B. U. II. 7' -- a citation tag from the edition's margin, not a word of Śaṅkara's own teaching.
Close to the Sanskrit
This is not Sanskrit prose but a bare page/section citation from the printed edition ('S. B. U.', section II, item 7) that was captured as if it were body text; there is no verse or commentary here to translate.