SB 10.1.9
kasman mukundo bhagavan
pitur gehad vrajam gatah
kva vasam jñatibhih sardham
krtavan satvatam patih
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Why did Krsna, the Supreme Personality of Godhead, leave the house of His father, Vasudeva, and transfer Himself to the house of Nanda in Vrndavana? Where did the Lord, the master of the Yadu dynasty, live with His relatives in Vrndavana?
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
These are inquiries about the itinerary of Krsna. Just after His birth in the house of Vasudeva in Mathura, Krsna transferred Himself to Gokula, on the other side of the Yamuna, and after some days He moved with His father, mother and other relatives to Nanda-grama, Vrndavana. Maharaja Pariksit was very much eager to hear about Krsna’s activities in Vrndavana. This entire canto of Srimad-Bhagavatam is full of activities performed in Vrndavana and Dvaraka. The first forty chapters describe Krsna’s Vrndavana affairs, and the next fifty describe Krsna’s activities in Dvaraka. Maharaja Pariksit, to fulfill his desire to hear about Krsna, requested Sukadeva Gosvami to describe these activities in full detail.