MyTemple - Vasudeva sutam devam Kamsa-Chanoora mardanam | Devaki parama-anandam Krishnam vande Jagatgurum || When Devaki gave birth to her first child, Kamsa came to the prison cell and slaughtered the newborn.
Kamsa Begins His Persecutions – Devoto Hare Krishna
The Hare Krsnas - Krsna's Later Pastimes with Demons - The Demon Kamsa