sarpa-caurāgni-vidyudbhyaḥ
kṣut-tṛd-vyādhy-ādibhir nṛpa
pañcatvam ṛcchate jantur
bhuṅkta ārabdha-karma tat
sarpa - from snakes; caura - thieves; agni - fire; vidyudbhyaḥ - and lightning; kṣut - from hunger; tṛṭ - thirst; vyādhi - disease; ādibhiḥ - and other agents; nṛpa - O King; pañcatvam - death; ṛcchate - obtains; jantuḥ - the conditioned living entity; bhuṅkte - he enjoys; ārabdha - already created by his past work; karma - the fruitive reaction; tat - that.
According to Śrīla Viśvanātha Cakravartī Ṭhākura, King Parīkṣit obviously was not suffering the reaction of past karma. As a great devotee he was personally brought back home, back to Godhead, by the Lord.