Shiva Purana
एवम्मान्त्वां च देवेशि ध्यात्वा नियतमानसः ॥ स्नापयेच्छंखतोयेन प्रणवप्रोक्षणक्रमात् ॥ ७१ ॥
After meditating on me and you like this, O goddess, the ascetic of restrained mind shall perform ablution with the water in the manner of Pranava—prokṣana.
english translation
evammAntvAM ca devezi dhyAtvA niyatamAnasaH ॥ snApayecchaMkhatoyena praNavaprokSaNakramAt ॥ 71 ॥
hk transliteration by Sanscript