In the book when is Bilbo Baggins first referred to as a burglar?

Bilbo Baggins is first referred to as a "burglar" in Chapter 13, "A Short Rest" of The Hobbit, after he successfully steals the Arkenstone from Smaug's hoard.

The specific line is:

> "And now I am a burglar, a thief in the night! But I have done it all for the sake of my friends!"

This moment marks a significant turning point in Bilbo's journey, as he embraces his role as a burglar and becomes more confident in his abilities.