Shiva Purana
शिवज्ञानानि यावंति विद्यास्थानापि यानि च ॥ षडक्षरस्य सूत्रस्य तानि भाष्यं समासतः ॥ ३३ ॥
Whatever texts there are, the texts expounding Śiva’s knowledge, the repositories of lore, they are the commentaries of the succinct aphorism, the six-syllabled mantra.
english translation
zivajJAnAni yAvaMti vidyAsthAnApi yAni ca ॥ SaDakSarasya sUtrasya tAni bhASyaM samAsataH ॥ 33 ॥
hk transliteration by Sanscript