Caitanya-caritāmṛta 13.99
sei-kāle nijālaya, uṭhiyā advaita rāya, nṛtya kare ānandita-mane haridāse lañā saṅge, huṅkāra-kīrtana-raṅge kene nāce, keha nāhi jāne
[sei-kaale nijaalaya, uthiyaa advaita raaya, nritya kare aanandita-mane haridaase lanaa sange, hunkaara-keertana-range kene naache, keha naahi jaane]
Blended reading (Sanskrit + English inline)
sei-kāle nijālaya, uṭhiyā advaita rāya, nṛtya kare ānandita-mane haridāse lañā saṅge, huṅkāra-kīrtana-raṅge kene nāce, keha nāhi jāne
At that time Śrī Advaita Ācārya Prabhu, in His own house at Śāntipura, was dancing in a pleasing mood. Taking Haridāsa Ṭhākura with Him, He danced and loudly chanted Hare Kṛṣṇa. But why they were dancing, no one could understand.
Purport
It is understood that Advaita Prabhu, at that time, was in His own paternal house at Śāntipura. Haridāsa Ṭhākura frequently used to meet Him. Coincidentally, therefore, he was also there, and upon the birth of Śrī Caitanya Mahāprabhu both of them immediately began to dance. But no one in Śāntipura could understand why those two saintly persons were dancing.
— A.C. Bhaktivedanta Swami Prabhupāda
My note
Source: vedabase.io