Hiraṇyakaśipu thought: I have used many ill names in chastising this boy Prahlāda and have devised many means of killing him, but despite all my endeavors, he could not be killed. Indeed, he saved himself by his own powers, without being affected in the least by these treacheries and abominable actions.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
एष मे बह्वसाधूक्तो वधोपायाश्च निर्मिताः । तैस्तैर्द्रोहैरसद्धर्मैर्मुक्तः स्वेनैव तेजसा
eṣa me bahvasādhūkto vadhopāyāśca nirmitāḥ | taistairdrohairasaddharmairmuktaḥ svenaiva tejasā
SB 7.5.45