mā vidyān madhusūdana
kaṁsād aham adhīra-dhīḥ
Devakī addressed the Supreme Personality of Godhead as Madhusūdana. She was aware that the Lord had killed many demons like Madhu who were hundreds and thousands of times more powerful than Kaṁsa, yet because of affection for the transcendental child, she believed that Kaṁsa could kill Him. Instead of thinking of the unlimited power of the Lord, she thought of the Lord with affection, and therefore she requested the transcendental child to disappear.