Mahabharata 15.35.1

वैशंपायन उवाच · vaiśaṃpāyana uvāca

तथा समुपविष्टेषु पाण्डवेषु महात्मसुव्यासः सत्यवतीपुत्रः प्रोवाचामन्त्र्य पार्थिवम्

tathā samupaviṣṭeṣu pāṇḍaveṣu mahātmasuvyāsaḥ satyavatīputraḥ provācāmantrya pārthivam

Our plain-language meaning of this verse is waiting for scholar review.