Shri Matsyendranatha Charitam Vol III Book IX Chp 21 Shlokas 1 - 6
श्रीसद्गुरुरुवाच
अद्य ताकमन्त्रस्य माहात्म्यं शास्त्रसंमतम् |
वक्ष्यामि वैष्णवश्रेष्ठाः शृणुध्वं प्रेमपूर्वकम् ||
कैलासाशिखरे रम्ये सर्वदेवनमस्कृते |
नानापुष्पसमाकीर्णं मन्दमारुतसेविते ||
नानामृगगणव्याप्ते पतत्रिगुणकूजिते |
सञ्चरन् वामदेवस्तु हैमवत्या सहादरात् ||
सरः संप्राप विमलं मानसं नाम विश्रुतम् |
तटे तस्य समासीनो रामनाम जजाप सः ||
तं विलोक्य महादेवं सर्वदेवनमस्कृतम् |
पप्रच्छ पार्वती भक्त्या प्रेमपूर्वं कृताञ्जलिः ||
पार्वत्युवाच
देव देव महादेव संशयोsयं महान् मम |
रामनाम जपस्येवं किमर्थं परमेक्ष्वर ||
Shri Sadguru said
Oh! Great vaishnavas! Now I shall tell you with ardent devotion the glory of the Taraka Mantra, extolled by the Shastras. Listen to me. On the pleasant mount Kailasa, worshipped by all the devas, enriched by flocks of chirping birds, herds of different animals, sweet, cool breeze, and many kinds of fragrant and beautiful flowers, Lord Shiva, along with his consort, moved slowly, and with great enthusiasm, went to the pond Manasarovar, which had pellucid water. Sitting on its bank, He chanted the Divine Name of Shri Rama. Looking at Shri Mahadeva, who is worshipped by all the devas, Devi Parvati, with folded hands, made loving enquiries as follows:
Devi Parvati said
Oh! Greatest of the devas! Mahadeva! Parameshwara! Why do you chant Rama Nama? Please tell me. I do not understand the implication clearly.