Caitanya-caritāmṛta 15.104
prabhu kahena, — ‘kṛṣṇa-sevā’, ‘vaiṣṇava-sevana’ ‘nirantara kara kṛṣṇa-nāma-saṅkīrtana’
[prabhu kahena, — ‘krishna-sevaa’, ‘vaishnava-sevana’ ‘nirantara kara krishna-naama-sankeertana’]
Blended reading (Sanskrit + English inline)
prabhu kahena, — ‘kṛṣṇa-sevā’, ‘vaiṣṇava-sevana’ ‘nirantara kara kṛṣṇa-nāma-saṅkīrtana’
Śrī Caitanya Mahāprabhu replied, “Without cessation continue chanting the holy name of Lord Kṛṣṇa. Whenever possible, serve Him and His devotees, the Vaiṣṇavas.”
My note
Source: vedabase.io