I thought this would be about the duplicate passage that constitutes 2 Kings 18:13 - 20:11 and Isaiah 36 - 38:8, although of course for that passage neither occurrence is marked off as an exact "chapter" in the much later numbering scheme for the Bible.
http://www.biblegateway.com/passage/?search=2%20Kings%2018-2...;
http://www.biblegateway.com/passage/?search=Isaiah%2036-38:8...;