Dan Brown "Who Said That?" Challenge #2

I share a quote from a Dan Brown book. You have to tell me:

1. Which of Dan Brown's novels it is found in, and
2. Who said it?

Let's see how well you know Dan Brown's books! here's today's quote:


"I am walking out your door right now. I need clothes. I am going to Vatican City."


Good luck and leave your answers in a comment.