Mahabharata 12.306.36
विश्वाविश्वेति यदिदं गन्धर्वेन्द्रानुपृच्छसिविश्वाव्यक्तं परं विद्याद्भूतभव्यभयंकरम्
viśvāviśveti yadidaṃ gandharvendrānupṛcchasiviśvāvyaktaṃ paraṃ vidyādbhūtabhavyabhayaṃkaram
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book