Caitanya-caritāmṛta 4.102
avatari’ prabhu pracārila saṅkīrtana eho bāhya hetu, pūrve kariyāchi sūcana
[avatari’ prabhu prachaarila sankeertana eho baahya hetu, poorve kariyaachi soochana]
Blended reading (Sanskrit + English inline)
avatari’ prabhu pracārila saṅkīrtana eho bāhya hetu, pūrve kariyāchi sūcana
The Lord came to propagate saṅkīrtana. That is an external purpose, as I have already indicated.
My note
Source: vedabase.io