CC Ādi 12.14

caitanya-gosāñira guru — keśava bhāratī
ei pitāra vākya śuni’ duḥkha pāila ati
Word for word: 
caitanya — Lord Caitanya; gosāñira — the spiritual master; guru — His spiritual master; keśava bhāratī — Keśava Bhāratī; ei — these; pitāra — his father’s; vākya — words; śuni’ — hearing; duḥkha — unhappiness; pāila — got; ati — very much.
Translation: 
When Acyutānanda heard from his father that Keśava Bhāratī was the spiritual master of Lord Caitanya Mahāprabhu, he was very unhappy.