Shiva Purana
अंगिरा गुरुरात्रेयो विमलो विश्वपावनः ॥ पावनः पुरजिच्छक्रस्त्रैविद्यो नववारण ॥ ८२ ॥
Angira is the Gururatreya and Vimala is the purifier of the universe. The holy Purajit Indra is the threefold knowledge and the nine elephants.
english translation
aMgirA gururAtreyo vimalo vizvapAvanaH ॥ pAvanaH purajicchakrastraividyo navavAraNa ॥ 82 ॥
hk transliteration by Sanscript