Srimad-Bhagavatam: Canto 10 - Chapter 1 - Verse 16
Sanskrit:
मार्गा बभूवु: सन्दिग्धस्तृणैश्छन्ना ह्यसंस्कृता: ।नाभ्यस्यमाना: श्रुतयो द्विजै: कालेन चाहता: ॥ १६ ॥
ITRANS:
mārgā babhūvuḥ sandigdhāstṛṇaiś channā hy asaṁskṛtāḥnābhyasyamānāḥ śrutayodvijaiḥ kālena cāhatāḥ
Translation:
During the rainy season the roads, not being cleansed, became covered with grass and debris and were thus difficult to make out. These roads were like religious scriptures that brāhmaṇas no longer study and that thus become corrupted and covered over with the passage of time.