Shiva Purana
दैत्योरगैश्च भुज्यंते पाताले वै सुखानि च ॥ तपसा समवाप्नोति दानवैस्सिद्धमानवैः॥ ३३॥
There the Daityas and serpents rejoice and enjoy pleasures. It is by performing penances that Dānavas and Siddha beings attain the same.
english translation
daityoragaizca bhujyaMte pAtAle vai sukhAni ca ॥ tapasA samavApnoti dAnavaissiddhamAnavaiH॥ 33॥
hk transliteration by Sanscript