Who said "Kindness costs nothing but gives much."?

This quote is attributed to Rubeus Hagrid.

Kindness costs nothing but gives much. - Rubeus Hagrid

"Kindness costs nothing but gives much."

Rubeus Hagrid Kindness

Character in Harry Potter and the Prisoner of Azkaban

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"Buckbeak is not an inferior creature just because he has a different way of doing things."

"Where there is prejudice, there is ignorance."

"Buckbeak is not a vicious beast to those who show him proper respect."

"Magical creatures are all dangerous. That's what makes them magical."

"A good man treats his wife with respect."

"Kindness always comes back around."

"The power of a smile can change everything."

"Kindness is weakness to some. Not to me."