CC Antya 13.97

rāmadāsa kahe, — “āmi śūdra adhama!
‘brāhmaṇera sevā’, — ei mora nija-dharma
Synonyms: 
rāmadāsa kahe — Rāmadāsa said; āmi — I; śūdra — a śūdra; adhama — most fallen; brāhmaṇera sevā — to serve a brāhmaṇa; ei — this; mora nija-dharma — my own religious duty.
Translation: 
Rāmadāsa replied, “I am a śūdra, a fallen soul. To serve a brāhmaṇa is my duty and religious principle.