p. 258
आख्यानपञ्चमैर्वेदैर्भूयिष्ठं कत्थ्यते जनः ।
In plain words
Mostly, people just boast — with the Vedas, and the old stories counted in as a fifth.
Close to the Sanskrit
By the Vedas of which narrative is the fifth, for the most part a person boasts.