Zen Koan about not worrying - can't remember its name and content

I remember reading offhand on a website a Zen Buddhist Koan that had not worrying as its theme, and one of the lines was "if you're about to go to Hell, don't worry". That's all I can remember of it. If anyone of you knows what I'm talking about, please share the name and text of this Koan. Thank you in advance.