Who said "Patience, dear boy, is a virtue most underrated."?

This quote is attributed to Irwin.

Patience, dear boy, is a virtue most underrated. - Irwin

"Patience, dear boy, is a virtue most underrated."

Irwin Patience

"Nergal's my best friend!"

"I'm a little Jewish boy with a big heart!"

"Gee, that's swell!"

"I love my mommy and daddy!"

"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."