Who said "Patience is the hardest virtue, but the most rewarding."?

This quote is attributed to Butters Stotch.

Patience is the hardest virtue, but the most rewarding. - Butters Stotch

"Patience is the hardest virtue, but the most rewarding."

Butters Stotch Patience

"I'm not bad, I'm just drawn that way"

"Aw, hamburgers!"

"You're grounded, mister!"

"I have to go do my chores now"

"Patience is a virtue I'm still learning."

"I may be a redhead, but I'm not a hothead."

"Patience is a virtue."

"Patience is a virtue I never learned."