Shiva Purana
ततस्सर्वे च ते तत्र प्रणवादीन्यनुक्रमात् ॥ उपदिश्य च वाक्यानि तात्पर्यं च समाहिताः ॥ ३४ ॥
Then all of them chanted the oṁkāras in order They instructed him in the phrases and concentrated on their meaning.
english translation
tatassarve ca te tatra praNavAdInyanukramAt ॥ upadizya ca vAkyAni tAtparyaM ca samAhitAH ॥ 34 ॥
hk transliteration by Sanscript