Srimad Bhagavatam Canto 08, Chapter 07, Text 05

SB 8.7.5

krta-sthana-vibhagas ta
 evam kasyapa-nandanah
mamanthuh paramam yatta
 amrtartham payo-nidhim
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
After thus adjusting how the snake was to be held, the sons of Kasyapa, both demigods and demons, began their activities, desiring to get nectar by churning the Ocean of Milk.
Srimad Bhagavatam Canto 08, Chapter 07, Text 04
Srimad Bhagavatam Canto 08, Chapter 07, Text 06