1 Chronicles 19:3

But the princes of the children of Ammon said to Hanun, Thinkest thou that David doth honour thy father, that he hath sent comforters unto thee? are not his servants come unto thee for to search, and to overthrow, and to spy out the land?

Are not his servants come unto thee for to search? - i:e., thy capital, Rabbah (2 Samuel 10:3).