Quote by J.K. Rowling

“Oh, no, sir, no,' said Dobby, looking suddenly serious. 'Tis part of the house-elf's enslavement, sir. We keeps their secrets and our silence, sir, we upholds the family's honour, and we never speaks ill of them - though Professor Dumbledore told Dobby he does not insist upon this. Professor Dumbledore said we is free to - to' Dobby looked suddenly nervous, and beckoned Harry closer. Harry bent forwards. Dobby whispered, 'He said we is free to call him a - a barmy old codger if we likes, sir!' Dobby gave a frightened sort of giggle.”

Quote by J.K. Rowling