CC Madhya 10.133

siddha-prāpti-kāle gosāñi ājñā kaila more
kṛṣṇa-caitanya-nikaṭe rahi seviha tāṅhāre
Word for word: 
siddhi-prāpti-kāle — at the time of his departure from this mortal world to achieve the highest perfection of life; gosāñi — my spiritual master; ājñā — order; kaila — made; more — unto me; kṛṣṇa-caitanya-nikaṭe — at the place of Śrī Kṛṣṇa Caitanya; rahi — remaining; seviha — render service; tāṅhāre — unto Him.
Translation: 
“Just before his departure from this mortal world to attain the highest perfection, Īśvara Purī told me that I should go to Śrī Caitanya Mahāprabhu and render service unto Him.