Srimad Bhagavatam Canto 04, Chapter 09, Text 01

SB 4.9.1

maitreya uvaca
ta evam utsanna-bhaya urukrame
 krtavanamah prayayus tri-vistapam
sahasrasirsapi tato garutmata
 madhor vanam bhrtya-didrksaya gatah
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
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 Sahasrasirsa incarnation, got on the back of Garuda, who carried Him to the Madhuvana Forest to see His servant Dhruva.
 
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
The word sahasrasirsa refers to the Personality of Godhead known as Garbhodakasayi Visnu. Although the Lord appeared as Ksirodakasayi Visnu, He has been described here as Sahasrasirsa Visnu because He is nondifferent from Garbhodakasayi Visnu. According to Srila Rupa Gosvami in his Laghu-bhagavatamrta, the Sahasrasirsa Personality of Godhead who appeared at that time was the incarnation known as Prsnigarbha. He created the planet known as Dhruvaloka for the habitation of Dhruva Maharaja.
Srimad Bhagavatam Canto 04, Chapter 09, Text 02