Srimad-Bhagavatam: Canto 4 - Chapter 1 - Verse 1

Sanskrit:

मैत्रेय उवाचत एवमुत्सन्नभया उरुक्रमेकृतावनामा: प्रययुस्त्रिविष्टपम् ।सहस्रशीर्षापि ततो गरुत्मतामधोर्वनं भृत्यदिद‍ृक्षया गत: ॥ १ ॥

ITRANS:

maitreya uvācata evam utsanna-bhayā urukramekṛtāvanāmāḥ prayayus tri-viṣṭapamsahasraśīrṣāpi tato garutmatāmadhor vanaṁ bhṛtya-didṛkṣayā gataḥ

Translation:

The great sage Maitreya told Vidura: When the demigods were thus reassured by the Personality of Godhead, they were freed from all fears, and after offering their obeisances they returned to their heavenly planets. Then the Lord, who is nondifferent from the Sahasraśīrṣā incarnation, got on the back of Garuḍa, who carried Him to the Madhuvana Forest to see His servant Dhruva.

Purport:

The word sahasraśīrṣā refers to the Personality of Godhead known as Garbhodakaśāyī Viṣṇu. Although the Lord appeared as Kṣīrodakaśāyī Viṣṇu, He has been described here as Sahasraśīrṣā Viṣṇu because He is nondifferent from Garbhodakaśāyī Viṣṇu. According to Śrīla Rūpa Gosvāmī in his Laghu-bhāgavatāmṛta, the Sahasraśīrṣā Personality of Godhead who appeared at that time was the incarnation known as Pṛśnigarbha. He created the planet known as Dhruvaloka for the habitation of Dhruva Mahārāja.