Caitanya-caritāmṛta 16.239
antare niṣṭhā kara, bāhye loka-vyavahāra acirāt kṛṣṇa tomāya karibe uddhāra
[antare nishthaa kara, baahye loka-vyavahaara achiraat krishna tomaaya karibe uddhaara]
Blended reading (Sanskrit + English inline)
antare niṣṭhā kara, bāhye loka-vyavahāra acirāt kṛṣṇa tomāya karibe uddhāra
Śrī Caitanya Mahāprabhu continued, “Within your heart you should keep yourself very faithful, but externally you may behave like an ordinary man. Thus Kṛṣṇa will soon be very pleased and deliver you from the clutches of māyā.
My note
Source: vedabase.io