Ezequiel 39:15

15 As they go through the land, anyone who sees a human bone will leave a marker beside it until the gravediggers bury it in the Valley of Hamon Gog,

15 And while they go through the land, if anyone sees a man's bone, he is to put up a sign by the place till those who are doing the work have put it in the earth in the valley of Hamon-gog.