Shiva Purana
नन्दीश्वर उवाच ॥ अर्जुनोपि तदा तत्र दीप्यमानो व्यदृश्यत ॥ मन्त्रेण शिवरूपेण तेजश्चातुलमावहत् ॥ १ ॥
Nandīśvara said:— Arjuna then appeared very brilliant and lustrous assuming unequalled splendour by means of Śiva mantra.
english translation
nandIzvara uvAca ॥ arjunopi tadA tatra dIpyamAno vyadRzyata ॥ mantreNa zivarUpeNa tejazcAtulamAvahat ॥ 1 ॥
hk transliteration by Sanscript