Vaishnava Samhita. Shri Vyasadasa Charitam I. Vol II Book VI Chp 2 Shlokas 19 - 20

करं गृहीत्वा कृष्णस्य वृषभानुसुता च सा 
नित्यं षोडशवर्षीय नानाभावप्रदर्शिनी    ||

श्वेतचम्पकवर्णाभा जगन्मोहनमोहिनी
ननर्त पुलिने रम्ये क्वणत्कनकनूपुरा   ||

Shri Radha the beloved daughter of Vrishabhanu ever dazzling young, as lustrous as the champaka flower, an adept in displaying different expressions during the dance, wearing tinkling golden anklets, exceedingly beautiful as the bewitch Shri Krishna Himself and capable of enchanting the entire universe, danced merrily on the silver sands of Yamuna, holding Shri Krishna's hands.

Vaishnava Samhita. Shri Vyasadasa Charitam I. Vol II Book VI Chp 2 Shlokas 15 - 18

मन्दमारुतसंसेव्ये पूर्णचन्द्रप्रभायुते 
यमुनापुलिने रम्ये प्रवृत्ते रासमण्डले 

वल्लवीजनमध्यस्थो वनमालाधरो हरिः 
वंशीविभूषितकरो वन्दारुजानवल्लभः 

अतसीपुष्पसङ्काशः केकिबर्हावतंसकः 
काञ्चीकङ्कणकेयूरहारकुण्डलमण्डितः 

सुगन्धचन्दनालिप्तः कस्तूरीतिलकाञ्चितः 
ननर्त राधया साकं जगन्मोहनविग्रहः 

The Raasa group (Raasa Mandal) had assembled on the bank of the merry Yamuna which was illuminated by the full-moon and was embraced by cool breeze. At the time Shri Krishna danced merrily, accompanied by Radha, in the midst of all Gopis. Shri Krishna was wearing a garland of sylvan flowers and playing on His flute. The Lord of the Gopis was having the hue of the atasi flower and was adorned with the peacock plume. Ornaments like mekala, kankan, the shoulder rings, the necklace, and ear-rings were glittering over his beautiful, divine form which was enchanting the whole world. His body was rubbed with fragrant sandal paste and he was wearing kasturi tilak on His forehead. 

Vaishnava Samhita. Shri Vyasadasa Charitam I. Vol II Book VI Chp 2 Shlokas 13

भक्ताः सङ्गम्य चान्योयं रसिका वैष्णवोत्तमाः 

कृष्णराधादिभावेन  रासनाट्यं प्रचक्रिरे  ||

Many bhaktas who were noble vaishnavottamas and great rasikas, assembled in a place. Assuming the roles of Lord Krishna, Devi Radha and the Gopis they engaged in Raasa dance.

Vaishnava Samhita. Shri Vyasadasa Charitam I. Vol II Book VI Chp 2 Shlokas 11 - 12

गोपीवेषं विधायेह सञ्चरन्ति च केचन 

गोपीभावमविज्ञाय वेषेणैव तु किं फलम्  ||

निःस्वार्थप्रेमविश्वासमेव भक्तेष्वपेक्षते 

रसज्ञो भगवान् कृष्णो वेषेण न हि वञ्चते  ||

Some roam about in the disguise of Gopis not possessing any knowledge of the depth of Gopi Prem. Then what is the use of posing like the Gopis? Bhagavan Shri Krishna takes delight only in selfless loving, devotion and unflinching faith. He is never carried away by mere deceptive appearance.

Vaishnava Samhita. Shri Vyasadasa Charitam I. Vol II Book VI Chp 2 Shloka 10

पौरुषं प्राकृते देहे यावदस्ति हि नश्वरे 

गोपीभाव विहीनानां नाधिकारो लतागृहे 

Those who have the pride of being born males and are attached to their physical forms can not understand Gopi Prem. Such persons do not enjoy the right to serve Shri Radha and Krishna in the nikunja.

Vaishnava Samhita. Shri Vyasadasa Charitam I. Vol II Book VI Chp 2 Shloka 8

सौरतं दिव्यदम्पत्योर्द्रष्टुं नार्हति कोपि च

गोपीभावयुतैर्भक्तैः श्रूयते नूपुरध्वनिः   ||

No one is eligible to witness the communion of the couple, Radha and Krishna. Only the sweet tinkling of the anklets of the pair is heard by a few devotees nurturing prema bhakti.

Vaishnava Samhita. Shri Vyasadasa Charitam I. Vol II Book VI Chp 2 Shlokas 6 - 7

Shri Vyasadasa Charitam I. Vol II Book VI C 1 Shlokas 6 - 7

सेवाकुञ्जसमीपे स वसन्नित्यं दृढव्रतः 

राधिकाकृष्णयोः सेवां चकार प्रेमपूर्वकम्  ||

इदमेव परं सौख्यं भावुकानां महात्मनाम् 

राधामाधवयोर्दास्यं निकुञ्जे लभ्यते यदि  ||

The steadfast Vyasadeva resided near the Seva Nikunja of the divine couple and was ever engaged in the sacred service of Shri Krishna and Radha. The great ones filled with loving devotion find amazing happiness when they get the chance of serving Shri Radha and Krishna in the Nikunja.