Shiva Purana
तस्माच्छब्दा नव प्रोक्ताः प्राणविद्भिस्तु लक्षिताः ॥ तान्प्रवक्ष्यामि यत्नेन नादसिद्धिमनुक्रमात् ॥ ३९॥
Hence the Śabdas are ninefold as explained by those who know the science of breath. I shall explain them assiduously in the proper order according to the Siddhi of Nāda.
english translation
tasmAcchabdA nava proktAH prANavidbhistu lakSitAH ॥ tAnpravakSyAmi yatnena nAdasiddhimanukramAt ॥ 39॥
hk transliteration by Sanscript