Shiva Purana
अनुवव्राज तान्विष्णुश्चक्रपाणिर्महाबलः ॥ पातालं परमं गत्वा संस्थितान्भीतभीतवत् ॥ ४४ ॥
The powerful Viṣṇu armed with his discus chased them even after they had gone to the ultimate end of Pātāla excessively frightened.
english translation
anuvavrAja tAnviSNuzcakrapANirmahAbalaH ॥ pAtAlaM paramaM gatvA saMsthitAnbhItabhItavat ॥ 44 ॥
hk transliteration by Sanscript