“No beggar, no beggar, no beggar, Sir!”
— Charles Dickens, David Copperfield (1850)
Context
Mr. Peggotty, the steadfast Yarmouth fisherman, is recounting how he has tracked across England in search of his niece Em'ly, who has been seduced and taken away by Steerforth. He has refused all charity along the way, supporting himself by his own labour as he searches.
How the repetition works
The triple "no beggar" is a working man's insistence on his dignity through grinding circumstance. Each repetition reinforces refusal — not just of alms but of the social position alms would assign him. Dickens uses the repetition to give the line the rhythm of a man who has had to say it many times before.