Ezekiel 39:12-16

For seven months the house of Israel will be burying them in order to cleanse the land.

And all the people of the land will bury them; and it will be to their renown on the day that I appear in My glory,” declares the Lord God.

“They will also select men who will constantly pass through the land, burying those who were passing through, those left on the surface of the ground, in order to cleanse it. At the end of seven months they will conduct a search.

As those who pass through the land pass through and anyone sees a human bone, then he will set up a marker by it until the burial detail has buried it in the Valley of Hamon-gog.

And even the name of the city will be Hamonah. So they will cleanse the land.” ’