Shiva Purana
हते तस्मिन्महावीर्य्ये निशुंभे भीमविक्रमे॥ शुंभे च सकला दैत्या विविशुर्बलिसद्मनि ॥ ४४ ॥
When the powerful Niśumbha, and Śumbha of terrible exploit were killed the Daityas entered Pātāla.
english translation
hate tasminmahAvIryye nizuMbhe bhImavikrame॥ zuMbhe ca sakalA daityA vivizurbalisadmani ॥ 44 ॥
hk transliteration by Sanscript