Mantra

Hrim Srî Râdhâ yai Svâhâ

1. Mûla mantra - Hrim 
2. Principal mantra - Srî Râdhâ yai Svâhâ

Parampara

From Krisna, Visnu got the Mantra; 

from Visnu, Brahmâ got; 

from Brahmâ Virât got, 

from Virât, Dharma got, and 

from Dharma Nara Narayan Rishi 

form Nara Narayan Rishi Narada  got this Mantra.

http://www.sacred-texts.com/hin/db/bk09ch50.htm

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