Then Sri Caitanya Mahaprabhu asked, "Out of all auspicious and beneficial activities, which is best for the living entity?" Ramananda Raya replied, "The only auspicious activity is association with the devotees of Krsna"

Expressions researched:
"Then Śrī Caitanya Mahāprabhu asked, “Out of all auspicious and beneficial activities, which is best for the living entity?” Rāmānanda Rāya replied, “The only auspicious activity is association with the devotees of Kṛṣṇa"

Sri Caitanya-caritamrta

CC Madhya-lila

Then Śrī Caitanya Mahāprabhu asked, “Out of all auspicious and beneficial activities, which is best for the living entity?” Rāmānanda Rāya replied, “The only auspicious activity is association with the devotees of Kṛṣṇa.”.

CC Madhya 8.251, Translation and Purport

Then Śrī Caitanya Mahāprabhu asked, “Out of all auspicious and beneficial activities, which is best for the living entity?” Rāmānanda Rāya replied, “The only auspicious activity is association with the devotees of Kṛṣṇa.”

According to Śrīmad-Bhāgavatam (SB 11.2.30):

ata ātyantikaṁ kṣemaṁ pṛcchāmo bhavato ’naghāḥ

saṁsāre ’smin kṣaṇārdho ’pi sat-saṅgaḥ śevadhir nṛṇām

“We are asking you to tell us what is the most perfect welfare activity. I think that in this material world, association with devotees—even if it be for a moment—is the greatest treasure house for mankind.”