Caitanya-caritāmṛta 17.135
eta kahi’ sandhyā-kale cāle gaurarāya kīrtanera kaila prabhu tina sampradāya
[eta kahi’ sandhyaa-kale chaale gauraraaya keertanera kaila prabhu tina sampradaaya]
Blended reading (Sanskrit + English inline)
eta kahi’ sandhyā-kale cāle gaurarāya kīrtanera kaila prabhu tina sampradāya
In the evening Lord Gaurasundara went out and formed three parties to perform kīrtana.
Purport
This is a scheme for performing kīrtana in a procession. During Śrī Caitanya Mahāprabhu’s time, one party was composed of twenty-one men: four people playing mṛdaṅgas, one leading the chanting, and sixteen others striking karatālas, responding to the leading chanter. If many men join the saṅkīrtana movement, they may follow in the footsteps of Śrī Caitanya Mahāprabhu and form different parties according to the time and the number of men available.
— A.C. Bhaktivedanta Swami Prabhupāda
My note
Source: vedabase.io