His [Vyāsadeva’s] son was a great devotee, an equibalanced monist, whose mind was always concentrated in monism. He was transcendental to mundane activities, but being unexposed, he appeared like an ignorant person.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
तस्य पुत्रो महायोगी समदृङ्निर्विकल्पकः । एकान्तमतिरुन्निद्रो गूढो मूढ इवेयते
tasya putro mahāyogī samadṛṅnirvikalpakaḥ | ekāntamatirunnidro gūḍho mūḍha iveyate
SB 1.4.4