SB 10.48.24
sa tvam prabho ’dya vasudeva-grhe ’vatirnah
svamsena bharam apanetum ihasi bhumeh
aksauhini-sata-vadhena suretaramsa-
rajñam amusya ca kulasya yaso vitanvan
Translation:
You are that very same Supreme Person, my Lord, and You have now appeared in the home of Vasudeva with Your plenary portion. You have done this to relieve the earth’s burden by killing hundreds of armies led by kings who are expansions of the demigods’ enemies, and also to spread the fame of our dynasty.
Purport:
The term suretaramsa-rajñam indicates that the demoniac kings slain by Krsna were in fact expansions or incarnations of the enemies of the demigods. This fact is elaborately explained in the Mahabharata, which reveals the specific identities of the demoniac kings.