Śrīmad-Bhāgavatam · Text 10.4.12
Who is speaking and story frame
किं मया हतया मन्द जात: खलु तवान्तकृत् ।
यत्र क्व वा पूर्वशत्रुर्मा हिंसी: कृपणान् वृथा ॥ १२ ॥
kiṁ mayā hatayā manda
jātaḥ khalu tavānta-kṛt
yatra kva vā pūrva-śatrur
mā hiṁsīḥ kṛpaṇān vṛthā
O Kaṁsa, 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.
Read this verse on Vedabase.ioThis verse has no purport; its meaning is explained by the verses around it.