Shiva Purana
विद्यास्थानं स्वकं रूपमृषिञ्छन्दो ऽधिदैवतम् ॥ बीजं शक्तिं तथा वाक्यं स्मृत्वा पञ्चाक्षरीं जपेत् ॥ २३ ॥
The place of knowledge is His own form, and the sage is the Vedic hymn. Remembering the seed, the power and the words, one should chant the five-syllable mantra.
english translation
vidyAsthAnaM svakaM rUpamRSiJchando 'dhidaivatam ॥ bIjaM zaktiM tathA vAkyaM smRtvA paJcAkSarIM japet ॥ 23 ॥
hk transliteration by Sanscript