The sage Maitreya said: After instructing Brahmā, the creator of the universe, to expand, the primeval Lord, the Personality of Godhead in His personal form as Nārāyaṇa, disappeared.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
मैत्रेय उवाच । तस्मा एवं जगत्स्रष्ट्रे प्रधानपुरुषेश्वरः । व्यज्येदं स्वेन रूपेण कञ्जनाभस्तिरोदधे
maitreya uvāca | tasmā evaṃ jagatsraṣṭre pradhānapuruṣeśvaraḥ | vyajyedaṃ svena rūpeṇa kañjanābhastirodadhe
SB 3.9.44