Who said "There's no need to call me 'sir,' Professor."?

This quote is attributed to Rubeus Hagrid.

There's no need to call me 'sir,' Professor. - Rubeus Hagrid

"There's no need to call me 'sir,' Professor."

Rubeus Hagrid Kindness

"You're a wizard, Harry."

"I'm not supposed to tell you that, but I will anyway."

"Yer mum and dad would've been proud."

"There's no Hogwarts without magic, and there's no magic without wonder."

"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."