Bhagavatapurana 11.4.18.p3

11.4.18.p3

saṃstunvato nipatitān śramaṇān ṛṣīṃś ca $ śakraṃ ca vṛtra-vadhatas tamasi praviṣṭam &

[He delivered] the praise-singing Vālikhilya sages who had fallen into [a cow's hoof-print], / and Śakra who had entered into darkness after the slaying of Vṛtra;