Caitanya-caritāmṛta 16.71
“tumi kṛṣṇa-nāma-mantra kailā upadeśe mantra pāñā kā’ra āge nā kare prakāśe
[“tumi krishna-naama-mantra kailaa upadeshe mantra paanaa kaa’ra aage naa kare prakaashe]
Blended reading (Sanskrit + English inline)
“tumi kṛṣṇa-nāma-mantra kailā upadeśe mantra pāñā kā’ra āge nā kare prakāśe
“My Lord,” he said, “You have given him initiation into the name of Kṛṣṇa, but after receiving the mantra he will not express it in front of everyone.
My note
Source: vedabase.io