Caitanya-caritāmṛta 24.171
ca-śabda api-arthe, ‘api’ — avadhāraṇe yatnāgraha vinā bhakti nā janmāya preme
[cha-shabda api-arthe, ‘api’ — avadhaarane yatnaagraha vinaa bhakti naa janmaaya preme]
Blended reading (Sanskrit + English inline)
ca-śabda api-arthe, ‘api’ — avadhāraṇe yatnāgraha vinā bhakti nā janmāya preme
“The word ‘ca’ may be used in place of ‘api,’ which gives emphasis to something. Thus it means that without sincere endeavor in devotional service, one cannot attain love of Godhead.
My note
Source: vedabase.io