Rudra kṛta Kṛṣṇa Mantra
॥ श्रीकृष्णस्य सप्तदशाक्षरो मन्त्रः॥ || śrīkṛṣṇasya saptadaśākṣaro mantraḥ ||
श्रीगणेशाय नमः। śrīgaṇeśāya namaḥ |
mahādeva uvācaḥ |
Śrī Mahādeva spoke
ॐ श्रीं नमः श्रीकृष्णाय परिपूर्णतमाय च।
मन्त्रेषु मन्त्रराजोऽयं महान् सप्तदशाक्षरः॥ १॥
om śrīṁ namaḥ śrīkṛṣṇāya paripūrṇatamāya ca |
mantreṣu mantrarājo’yaṁ mahān saptadaśākṣaraḥ || 1||
“om śrīṁ namaḥ śrīkṛṣṇāya paripūrṇatamāya etc.,” is the mantra-rāja and is a mahā 17-syllable mantra
Actually the number of syllables in “om śrīṁ namaḥ śrīkṛṣṇāya paripūrṇatamāya” are fifteen. By adding ‘svāhā’ at the end of the mantra, it converts to seventeen syllable mantra.
Radha (Sanskrit: राधा, Rādhā), also called Rādhikā, Radharani and Radhika-rani, is almost always depicted alongside Krishna and features prominently within the theology of today’s Vallabha, Utkaliya and Gaudiya Vaishnava sects, which regards Radha as the original Goddess or Shakti. Radha is also the principal god of worship in the Nimbarka Sampradaya, as Nimbarka, the founder of the tradition, declared that Radha and Krishna together constitute the absolute truth.
Please note that Radha is not mentioned anywhere in books like Bhagavata Purana,Vishnu Purana, Harivamsha or Mahabharata.
Extracts from Brahmavaivarta Purāṇa
Nanda asked :
1. Tell me, O Lord, which sort of dreams gives happiness and merit to the seer and produces good results.
Śrī Kṛṣṇa replied :
2-3. My father! The Sāmaveda is regarded an authority in all matters.