SB 12.13.17
ksetranam caiva sarvesam
yatha kasi hy anuttama
tatha purana-vratanam
srimad-bhagavatam dvijah
Translation:
O brahmanas, in the same way that the city of Kasi is unexcelled among holy places, Srimad-Bhagavatam is supreme among all the Puranas.