When a conditioned soul is killed by snakes, thieves, fire, lightning, hunger, disease or anything else, he is experiencing the reaction to his own past work.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
सर्पचौराग्निविद्युद्भ्यः क्षुत्तृट्व्याध्यादिभिर्नृप । पञ्चत्वमृच्छते जन्तुर्भुङ्क्त आरब्धकर्म तत्
sarpacaurāgnividyudbhyaḥ kṣuttṛṭvyādhyādibhirnṛpa | pañcatvamṛcchate janturbhuṅkta ārabdhakarma tat
SB 12.6.26