Caitanya-caritāmṛta 13.31
kiśora vayase ārambhilā saṅkīrtana rātra-dine preme nṛtya, saṅge bhakta-gaṇa
[kishora vayase aarambhilaa sankeertana raatra-dine preme nritya, sange bhakta-gana]
Blended reading (Sanskrit + English inline)
kiśora vayase ārambhilā saṅkīrtana rātra-dine preme nṛtya, saṅge bhakta-gaṇa
Just prior to His youthful life, He began the saṅkīrtana movement. Day and night He used to dance in ecstasy with His devotees.
My note
Source: vedabase.io