Mahabharata 6.13.22
अन्धकारकदेशात्तु मुनिदेशः परः स्मृतःमुनिदेशात्परश्चैव प्रोच्यते दुन्दुभिस्वनः
andhakārakadeśāttu munideśaḥ paraḥ smṛtaḥmunideśātparaścaiva procyate dundubhisvanaḥ
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book