Caitanya-caritāmṛta 5.91
sei ta’ puruṣa yāṅra ‘aṁśa’ dhare nāma caitanyera saṅge sei nityānanda-rāma
[sei ta’ purusha yaanra ‘amsha’ dhare naama chaitanyera sange sei nityaananda-raama]
Blended reading (Sanskrit + English inline)
sei ta’ puruṣa yāṅra ‘aṁśa’ dhare nāma caitanyera saṅge sei nityānanda-rāma
That Mahā-puruṣa [Kāraṇodakaśāyī Viṣṇu] is known as a plenary part of Him who is Lord Nityānanda Balarāma, the favorite associate of Lord Caitanya.
My note
Source: vedabase.io