What is the quote when Elizabeth Bennet tells her father or Mr Darcy about Lydia's behavior at the Neitherfield ball?

The quote from "Pride and Prejudice" by Jane Austen is when Elizabeth Bennet tells Mr. Darcy about Lydia's behavior at the Netherfield ball: "She could have added, 'A young man, too, like you, whose very countenance may vouch for your being amiable.'"