Ezekiel 39:12
And the house of Israel shall bury them, to cleanse the land, seven months.
Deuteronomy 21:23
his body shall not remain all night on the tree. But you shall surely bury him that day (for he that is hanged is accursed of God), so that your land may not be defiled, which Jehovah your God gives you for an inheritance.
Ezekiel 39:14
And men shall separate those who continually pass through the land, burying those who passed through, who remain on the face of the earth, to cleanse it. At the end of seven months they shall search.
Ezekiel 39:16
And also the name of the city is The Multitude. And they shall cleanse the land.
Numbers 19:16
And whoever touches one that is killed with a sword in the open fields, or a dead body, or a bone of a man, or a grave, shall be unclean seven days.