How are the things of Esau searched out! how are his hidden things sought up!
How are the things of Esau searched out! - by hostile soldiers seeking booty. Compare with Obadiah 1:5-6 here Jeremiah 49:9-10, "If grape-gatherers come to thee, would they not leave some gleaning grapes? if thieves by night, they will destroy until they have enough. But I have made Esau bare, I have uncovered his secret places, and he shall not be able to hide himself;" quoted evidently from Obadiah, whose prophecies he thus gives the stamp of inspiration to.
How are his hidden things sought up! - "hidden things," or places. Edom abounded in such hiding-places as caves, clefts in the rock, etc. None of these should be left unexplored by the foe.