CC Antya 4.82

mātāra ājñāya āmi vasi nīlācale
tāhāṅ ‘dharma’ śikhāite nāhi nija-bale
Synonyms: 
mātāra — of My mother; ājñāya — by the order; āmi — I; vasi — reside; nīlācale — at Jagannātha Purī; tāhāṅ — in Mathurā and Vṛndāvana; dharma śikhāite — to teach religious principles; nāhi — not; nija-bale — within My ability.
Translation: 
“By the order of My mother I am sitting here in Jagannātha Purī; therefore, I cannot go to Mathurā-Vṛndāvana to teach people how to live there according to religious principles.