Vishnu Puran 14 English Sub Merged

War breaks between demons and gods. When demons die, their teacher Shukracharya brings them back to life. Thus demons win the battle. When no option is left for gods, they approach God Vishnu for help. God Vishnu says that there is only one answer for sanjeevini that is nectar. But to get nectar they must chum the ocean. For chumming He will give Mandar mountain and Vasuki snake. But they will have to take cooperation from demons.