You haven't got a letter on ...

You haven\'t got a letter on yours,\
You haven't got a letter on yours," George observed. "I suppose she thinks you don't forget your name. But we're not stupid-we know we're called Gred and Forge.

Quotes from the same author

Raindrops the size of bullets thundered on the castle windows for days on end; the lake rose, the flower beds turned into muddy streams, and Hagrid’s pumpkins swelled to the size of garden sheds.
He didn't realize that love as powerful as your mother's for you leaves its own mark.
I am prouder of my years as a single mother than of any other part of my life.
So why in the name of Merlin’s saggy left — Don’t talk to your mother like that.
Hermione drew herself to her full height; her eyes were narrowed and her hair seemed to crackle with electricity. "No," she said, her voice quivering with anger, "but I will write to your mother.