Caitanya-caritāmṛta 9.33
sahasra-nāmnāṁ puṇyānāṁ trir-āvṛttyā tu yat phalam ekāvṛttyā tu kṛṣṇasya nāmaikaṁ tat prayacchati
[sahasra-naamnaam punyaanaam trir-aavrittyaa tu yat phalam ekaavrittyaa tu krishnasya naamaikam tat prayachchati]
Blended reading (Sanskrit + English inline)
sahasra-nāmnāṁ puṇyānāṁ trir-āvṛttyā tu yat phalam ekāvṛttyā tu kṛṣṇasya nāmaikaṁ tat prayacchati
“ ‘The pious results derived from chanting the thousand holy names of Viṣṇu three times can be attained by only one utterance of the holy name of Kṛṣṇa.’
Purport
This verse from the Brahmāṇḍa Purāṇa is found in the Laghu-bhāgavatāmṛta (1.5.354), by Rūpa Gosvāmī. Simply by chanting the name of Kṛṣṇa once, one can attain the same results achieved by chanting the holy name of Rāma three times.
— A.C. Bhaktivedanta Swami Prabhupāda
My note
Source: vedabase.io