Cross reference
Ezekiel 39:15
15 Those who pass through the land shall pass through; and when any sees a man's bone, then shall he set up a sign by it, until the undertakers have buried it in the valley of Hamon Gog.
Luke 11:44
44 Woe to you, scribes and Pharisees, hypocrites! For you are like hidden graves, and the men who walk over them don't know it."