Srimad Bhagavatam Canto 10, Chapter 04, Text 12

SB 10.4.12

kim maya hataya manda
 jatah khalu tavanta-krt
yatra kva va purva-satrur
 ma himsih krpanan vrtha
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
O Kamsa, you fool, what will be the use of killing me? The Supreme Personality of Godhead, who has been your enemy from the very beginning and who will certainly kill you, has already taken His birth somewhere else. Therefore, do not unnecessarily kill other children.
Srimad Bhagavatam Canto 10, Chapter 04, Text 10-11
Srimad Bhagavatam Canto 10, Chapter 04, Text 13