Who said "We can't afford to make careless mistakes."?

This quote is attributed to Velma Dinkley.

We can't afford to make careless mistakes. - Velma Dinkley

"We can't afford to make careless mistakes."

Velma Dinkley Patience

"Jinkies!"

"My glasses! I can't see without my glasses!"

"Let's split up, gang."

"This is no accident. There are clues here."

"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."