“Various suggestions that completely deny the biblical tradition regarding King David and argue that he was a mythological figure, or just a leader of a small tribe, are now shown to be wrong.”
Indeed. 2 Timothy 3:16-17
Grant Jeffries wrote a book called, “The Signature of God” which is filled with evidences like this.
http://www.amazon.com/The-Signature-God-Grant-Jeffrey/dp/084994094X