Which I Love Lucy episode quote is this from?

I do not remember the exact line, i caught it at the last second, Fred and Ethel were having a discussion and Fred something about him being a penny pincher and then Ethel said something to the effect of "If there is a penny out there he will pinch it!" if anyone knows which episode this is from, you will be saving me a TON of time re-watching every single episode! thanks!