LOST Fans:- Help!

In episode 605, “Lighthouse”, Kate tells Jack, “I hope you find what you’re looking for.”

Holli and I are sure that this quote has shown up in LOST before, but we can’t find it. Do you guys know? It’s figuratively killing us!

If you know it and include episode number or title in your comment, we’ll name our baby after you*.

*If Jacob lets us.