Shriradhanaam Maatren Moorchhaashaadmaasiki Bhavet - Kausitaki Samhita

Shriradhanaam Maatren Moorchhaashaadmaasiki Bhavet - Kausitaki Samhita

Shriradhanaam Maatren Moorchhaashaadmaasiki Bhavet.
Nochchaaritamatah Spashtam Parikshiddhit Krinmunih.

- Kausitaki Samhita

If Shukdeva Paramhansa would have taken "Shri Radha" name during the recitation of Srimad Bhagwatam to Parikshit, then He would have gone into constant divine ecstasy for six months. Therefore He has not taken "Sri Radha" name directly.