Shiva Purana
काकाक्षिन्यायमाश्रित्य वर्त्तते पार्श्वतोन्वहम् ॥ विद्यातत्त्वमिदं प्रोक्तं शुद्धविद्यामहेश्वरौ ॥ ३२ ॥
He lives by his side every day relying on the law of the crow's eyes This essence of knowledge has been described by the two great Lords of pure knowledge.
english translation
kAkAkSinyAyamAzritya varttate pArzvatonvaham ॥ vidyAtattvamidaM proktaM zuddhavidyAmahezvarau ॥ 32 ॥
hk transliteration by Sanscript