CC Madhya 3.113

nityānanda gosāñi bule ācārya dhariñā
haridāsa pāche nāce haraṣita hañā
Word for word: 
nityānanda gosāñi — Lord Nityānanda Prabhu; bule — began to move, dancing; ācārya dhariñā — following Advaita Ācārya; haridāsa — Haridāsa Ṭhākura; pāche — behind; nāce — dances; haraṣita hañā — being pleased.
Translation: 
When Advaita Ācārya began to dance, Nityānanda Prabhu began dancing behind Him. Haridāsa Ṭhākura, being very pleased, also began dancing behind Him.