CC Antya 7.102

ācāryādi-āge bhaṭṭa yabe yabe yāya
rājahaṁsa-madhye yena rahe baka-prāya
Synonyms: 
ācārya-ādi-āge — in front of Advaita Ācārya and others; bhaṭṭa — Vallabha Bhaṭṭa; yabe yabe — whenever; yāya — goes; rāja-haṁsa-madhye — in a society of white swans; yena — as; rahe — remained; baka-prāya — like a duck.
Translation: 
Whenever Vallabha Bhaṭṭa entered the society of devotees, headed by Advaita Ācārya, he was like a duck in a society of white swans.