Hiraṇyakaśipu said: While Yamarāja, in the form of a small boy, was instructing all the relatives surrounding the dead body of Suyajña, everyone was struck with wonder by his philosophical words. They could understand that everything material is temporary, not continuing to exist.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
हिरण्यकशिपुरुवाच । बाल एवं प्रवदति सर्वे विस्मितचेतसः । ज्ञातयो मेनिरे सर्वमनित्यमयथोत्थितम्
hiraṇyakaśipuruvāca | bāla evaṃ pravadati sarve vismitacetasaḥ | jñātayo menire sarvamanityamayathotthitam
SB 7.2.58