Caitanya-caritāmṛta 1.27
caitanya-gosāñi yāṅre bale ‘baḍa bhāi’ teṅho kahe, mora prabhu — caitanya-gosāñi
[chaitanya-gosaani yaanre bale ‘bada bhaai’ tenho kahe, mora prabhu — chaitanya-gosaani]
Blended reading (Sanskrit + English inline)
caitanya-gosāñi yāṅre bale ‘baḍa bhāi’ teṅho kahe, mora prabhu — caitanya-gosāñi
Caitanya Mahāprabhu used to address Nityānanda Prabhu as His elder brother, whereas Nityānanda Prabhu addressed Śrī Caitanya Mahāprabhu as His Lord.
My note
Source: vedabase.io