Shiva Purana
मयाभिधीयते तस्मादध्वातीतपदोस्म्यहम् ॥ अध्वात्मकं तु त्रितयं शिवविद्यात्मसंज्ञितम् ॥ ३८ ॥
Therefore I am the transcendental form of the Supreme Personality of Godhead. The threefold path consisting of the Adhva is called the Self of Shiva Vidya.
english translation
mayAbhidhIyate tasmAdadhvAtItapadosmyaham ॥ adhvAtmakaM tu tritayaM zivavidyAtmasaMjJitam ॥ 38 ॥
hk transliteration by Sanscript