Shiva Purana
एतस्मिन्नंतरे देवः पिनाकी परमेश्वरः ॥ शक्रस्य रूपमास्थाय गन्तुं चक्रे मतिं ततः ॥ ७ ॥
In the meantime, the trident-bearing lord Śiva resolved to go there assuming the form of Indra.
english translation
etasminnaMtare devaH pinAkI paramezvaraH ॥ zakrasya rUpamAsthAya gantuM cakre matiM tataH ॥ 7 ॥
hk transliteration by Sanscript