Shiva Purana
ऋतधामा तदिन्द्रो हि त्रिलोकी राज्यकृत्सुखी ॥ द्वादशे चैव पर्याये भाव्ये रौच्यांतरे मुने ॥ ५८ ॥
That is the abode of truth and Indra is the happy ruler of the three worlds O sage in the twelfth also in the future in the interval of Rauchya.
english translation
RtadhAmA tadindro hi trilokI rAjyakRtsukhI ॥ dvAdaze caiva paryAye bhAvye raucyAMtare mune ॥ 58 ॥
hk transliteration by Sanscript