Who said "Doing the right thing is its own reward."?

This quote is attributed to Marge Simpson.

Doing the right thing is its own reward. - Marge Simpson

"Doing the right thing is its own reward."

Marge Simpson Justice

"I don't use cologne. I'm scent-free."

"Mmm, donuts."

"You know, Homer, I've learned that sometimes the best things in life are the simple ones."

"I believe in telling the truth, even when it's difficult."

"Justice must always prevail."

"You think I'm just some animal?"

"Fighting for what's right never gets easier."

"Justice is worth fighting for."